diff --git a/lib/plugins/Invoke-IcingaCheckBiosSerial.psm1 b/lib/plugins/Invoke-IcingaCheckBiosSerial.psm1
index 8f71fb7..14793f0 100644
--- a/lib/plugins/Invoke-IcingaCheckBiosSerial.psm1
+++ b/lib/plugins/Invoke-IcingaCheckBiosSerial.psm1
@@ -1,5 +1,24 @@
 Import-IcingaLib provider\bios;
 
+<#
+.SYNOPSIS
+   Finds out the Bios Serial
+.DESCRIPTION
+   Invoke-IcingaCheckBiosSerial returns either the Bios Serial or nothing.
+   More Information on https://github.com/LordHepipud/icinga-module-windows
+.FUNCTIONALITY
+   This module is intended to be used to find out the Bios Serial of a given system
+   Either the a Bios Serial is returned or not. Thereby the Check is always okay.
+.EXAMPLE
+   PS>Invoke-IcingaCheckBiosSerial
+   [OK]: SerialNumber is 1234-5678-9101-1121-3141-5161-7100
+.OUTPUTS
+   System.String
+.LINK
+   https://github.com/LordHepipud/icinga-module-windows
+.NOTES
+#>
+
 function Invoke-IcingaCheckBiosSerial()
 {
     $Bios      = Get-IcingaBiosSerialNumber;
diff --git a/lib/plugins/Invoke-IcingaCheckCPU.psm1 b/lib/plugins/Invoke-IcingaCheckCPU.psm1
index da6fc66..194dafc 100644
--- a/lib/plugins/Invoke-IcingaCheckCPU.psm1
+++ b/lib/plugins/Invoke-IcingaCheckCPU.psm1
@@ -2,11 +2,44 @@ Import-IcingaLib core\perfcounter;
 Import-IcingaLib core\tools;
 Import-IcingaLib icinga\plugin;
 
+<#
+.SYNOPSIS
+   Checks cpu usage of cores.
+.DESCRIPTION
+   Invoke-IcingaCheckCPU returns either 'OK', 'WARNING' or 'CRITICAL', based on the thresholds set.
+   e.g A system has 4 cores, each running at 60% usage, WARNING is set to 50%, CRITICAL is set to 75%. In this case the check will return WARNING.
+   More Information on https://github.com/LordHepipud/icinga-module-windows
+.FUNCTIONALITY
+   This module is intended to be used to check on the current cpu usage of a specified core.
+   Based on the thresholds set the status will change between 'OK', 'WARNING' or 'CRITICAL'. The function will return one of these given codes.
+.EXAMPLE
+   PS>Invoke-IcingaCheckCpu -Warning 50 -Critical 75
+   [OK]: Check package "CPU Load" is [OK]
+   | 'Core #0'=4,588831%;50;75;0;100 'Core #1'=0,9411243%;50;75;0;100 'Core #2'=11,53223%;50;75;0;100 'Core #3'=4,073013%;50;75;0;100
+.EXAMPLE
+   PS>Invoke-IcingaCheckCpu -Warning 50 -Critical 75 -Core 1  
+   [OK]: Check package "CPU Load" is [OK]
+   | 'Core #1'=2,612651%;50;75;0;100 
+.PARAMETER Warning
+   Used to specify a Warning threshold. In this case an integer value.
+.PARAMETER Critical
+   Used to specify a Critical threshold. In this case an integer value.
+.PARAMETER Core
+   Used to specify a single core to check on.
+.INPUTS
+   System.String
+.OUTPUTS
+   System.String
+.LINK
+   https://github.com/LordHepipud/icinga-module-windows
+.NOTES
+#>
+
 function Invoke-IcingaCheckCPU()
 {
     param(
-        $Warning,
-        $Critical,
+        [int]$Warning,
+        [int]$Critical,
         $Core               = '*',
         [switch]$NoPerfData,
         $Verbose
diff --git a/lib/plugins/Invoke-IcingaCheckDirectory.psm1 b/lib/plugins/Invoke-IcingaCheckDirectory.psm1
new file mode 100644
index 0000000..bfcc104
--- /dev/null
+++ b/lib/plugins/Invoke-IcingaCheckDirectory.psm1
@@ -0,0 +1,98 @@
+Import-IcingaLib provider\bios;
+
+<#
+.SYNOPSIS
+   Checks how many files are in a directory.
+.DESCRIPTION
+   Invoke-IcingaCheckDirectory returns either 'OK', 'WARNING' or 'CRITICAL', based on the thresholds set.
+   e.g 'C:\Users\Icinga\Backup' contains 200 files, WARNING is set to 150, CRITICAL is set to 300. In this case the check will return CRITICAL
+   More Information on https://github.com/LordHepipud/icinga-module-windows
+.FUNCTIONALITY
+   This module is intended to be used to check how many files and directories are within are specified path. 
+   Based on the thresholds set the status will change between 'OK', 'WARNING' or 'CRITICAL'. The function will return one of these given codes.
+.EXAMPLE
+   PS>Invoke-IcingaCheckDirectory -Path "C:\Users\Icinga\Downloads" -InvokeIcingaCheck_Int_Warning 20 -InvokeIcingaCheck_Int_Critical 30 -Verbose 3
+   [OK]: Check package "C:\Users\Icinga\Downloads" is [OK] (Match All)
+    \_ [OK]: C:\Users\Icinga\Downloads is 19
+.EXAMPLE
+   PS>Invoke-IcingaCheckDirectory -Path "C:\Users\Icinga\Downloads" -InvokeIcingaCheck_Int_Warning 20 -InvokeIcingaCheck_Int_Critical 30 -Verbose 3
+   [WARNING]: Check package "C:\Users\Icinga\Downloads" is [WARNING] (Match All)
+    \_ [WARNING]: C:\Users\Icinga\Downloads is 24
+.EXAMPLE
+   PS>Invoke-IcingaCheckDirectory -Path "C:\Users\Icinga\Downloads" -InvokeIcingaCheck_Int_Warning 20 -InvokeIcingaCheck_Int_Critical 30 -Verbose 3 -YoungerThen 08.10.2018 -OlderThen 10.12.2018
+   [OK]: Check package "C:\Users\Icinga\Downloads" is [OK] (Match All)
+    \_ [OK]: C:\Users\Icinga\Downloads is 1
+.EXAMPLE
+   PS>Invoke-IcingaCheckDirectory -Path "C:\Users\Icinga\Downloads" -FileNames "*.txt","*.sql" -InvokeIcingaCheck_Int_Warning 20 -InvokeIcingaCheck_Int_Critical 30 -Verbose 3
+   [OK]: Check package "C:\Users\Icinga\Downloads" is [OK] (Match All)
+    \_ [OK]: C:\Users\Icinga\Downloads is 4
+.PARAMETER IcingaCheckDirectory_Int_Warning
+   Used to specify a Warning threshold. In this case an integer value.
+.PARAMETER IcingaCheckDirectory_Int_Critical
+   Used to specify a Critical threshold. In this case an integer value.
+.PARAMETER Path
+   Used to specify a path.
+   e.g. 'C:\Users\Icinga\Downloads'
+.PARAMETER FileNames
+   Used to specify an array of filenames or expressions to match against.
+   
+   e.g '*.txt','.sql' # Fiends all files ending with .txt and .sql
+.PARAMETER Recurse
+   A switch, which can be set to filter through directories recursively.
+.PARAMETER YoungerThen
+   String that expects input format "MM.dd.yyyy". Used to only filter for files younger then the specified date.
+.PARAMETER OlderThen
+   String that expects input format "MM.dd.yyyy". Used to only filter for files older then the specified date.
+.INPUTS
+   System.String
+.OUTPUTS
+   System.String
+.LINK
+   https://github.com/LordHepipud/icinga-module-windows
+.NOTES
+#>
+
+function Invoke-IcingaCheckDirectory()
+{
+    param(
+        [string]$Path,
+        [array]$FileNames,
+        [switch]$Recurse,
+        [int]$IcingaCheckDirectory_Int_Critical,
+        [int]$IcingaCheckDirectory_Int_Warning,
+        [string]$YoungerThen,
+        [string]$OlderThen,
+        [int]$Verbose
+    );
+
+    if ($Recurse -eq $TRUE) {
+        $FileCount = (Get-ChildItem -Include $FileNames -Recurse -Path $Path);
+    } else {
+        $FileCount = (Get-ChildItem -Include $FileNames -Path $Path);
+    }
+    
+    if ($OlderThen -ne "" -And $YoungerThen -ne "") {
+        $OlderThen=[datetime]::ParseExact($OlderThen,'MM.dd.yyyy',$null)
+        $YoungerThen=[datetime]::ParseExact($YoungerThen,'MM.dd.yyyy',$null)
+        $FileCount = ($FileCount | Where-Object {$_.LastWriteTime -lt ($OlderThen)}) #| Where-Object {$_LastWriteTime -gt ($YoungerThen)}
+        $FileCount = ($FileCount | Where-Object {$_.LastWriteTime -gt ($YoungerThen)})
+    } elseif ($OlderThen -ne "") {
+        $OlderThen=[datetime]::ParseExact($OlderThen,'MM.dd.yyyy',$null)
+        $FileCount = ($FileCount | Where-Object {$_.LastWriteTime -lt ($OlderThen)})
+    } elseif ($YoungerThen -ne "") {
+        $YoungerThen=[datetime]::ParseExact($YoungerThen,'MM.dd.yyyy',$null)
+        $FileCount = ($FileCount | Where-Object {$_.LastWriteTime -gt ($YoungerThen)})
+    }
+
+    $DirectoryCheck = New-IcingaCheck -Name $Path -Value $FileCount.Count -NoPerfData;
+
+    $DirectoryCheck.WarnOutOfRange(
+        ($IcingaCheckDirectory_Int_Warning)
+    ).CritOutOfRange(
+        ($IcingaCheckDirectory_Int_Critical)
+    ) | Out-Null;
+
+    $DirectoryPackage = New-IcingaCheckPackage -Name $Path -OperatorAnd -Checks $DirectoryCheck -Verbose $Verbose;
+
+    return (New-IcingaCheckresult -Check $DirectoryPackage -NoPerfData $TRUE -Compile);
+}
\ No newline at end of file
diff --git a/lib/plugins/Invoke-IcingaCheckProcessCount.psm1 b/lib/plugins/Invoke-IcingaCheckProcessCount.psm1
index fba2d26..37ff850 100644
--- a/lib/plugins/Invoke-IcingaCheckProcessCount.psm1
+++ b/lib/plugins/Invoke-IcingaCheckProcessCount.psm1
@@ -1,11 +1,47 @@
 Import-IcingaLib provider\process;
 Import-IcingaLib icinga\plugin;
 
+<#
+.SYNOPSIS
+   Checks how many processes of a process exist.
+.DESCRIPTION
+   Invoke-IcingaCheckDirectory returns either 'OK', 'WARNING' or 'CRITICAL', based on the thresholds set.
+   e.g there are three conhost processes running, WARNING is set to 3, CRITICAL is set to 4. In this case the check will return WARNING.
+   More Information on https://github.com/LordHepipud/icinga-module-windows
+.FUNCTIONALITY
+   This module is intended to be used to check how many processes of a process exist.
+   Based on the thresholds set the status will change between 'OK', 'WARNING' or 'CRITICAL'. The function will return one of these given codes.
+.EXAMPLE
+   PS>Invoke-IcingaCheckProcessCount -Process conhost -Warning 5 -Critical 10
+   [OK]: Check package "Process Check" is [OK]
+   | 'Process Count "conhost"'=3;; 
+.EXAMPLE
+   PS>Invoke-IcingaCheckProcessCount -Process conhost,wininit -Warning 5 -Critical 10 -Verbose 4
+   [OK]: Check package "Process Check" is [OK] (Match All)
+    \_ [OK]: Process Count "conhost" is 3
+    \_ [OK]: Process Count "wininit" is 1
+   | 'Process Count "conhost"'=3;5;10 'Process Count "wininit"'=1;5;10
+.PARAMETER Warning
+   Used to specify a Warning threshold. In this case an integer value.
+.PARAMETER Critical
+   Used to specify a Critical threshold. In this case an integer value.
+.PARAMETER Process
+   Used to specify an array of processes to count and match against.
+   e.g. conhost,wininit
+.INPUTS
+   System.String
+.OUTPUTS
+   System.String
+.LINK
+   https://github.com/LordHepipud/icinga-module-windows
+.NOTES
+#>
+
 function Invoke-IcingaCheckProcessCount()
 {
     param(
-        $Warning,
-        $Critical,
+        [int]$Warning,
+        [int]$Critical,
         [array]$Process,
         [switch]$NoPerfData,
         $Verbose
diff --git a/lib/plugins/Invoke-IcingaCheckService.psm1 b/lib/plugins/Invoke-IcingaCheckService.psm1
index 4c4fcd4..23f8b30 100644
--- a/lib/plugins/Invoke-IcingaCheckService.psm1
+++ b/lib/plugins/Invoke-IcingaCheckService.psm1
@@ -5,38 +5,28 @@ Import-IcingaLib icinga\plugin;
 <#
 .SYNOPSIS
    Checks if a service has a specified status.
-
 .DESCRIPTION
    Invoke-icingaCheckService returns either 'OK' or 'CRITICAL', if a service status is matching status to be checked.
-
    More Information on https://github.com/LordHepipud/icinga-module-windows
-
 .FUNCTIONALITY
    This module is intended to be used to check whether one or more services have a certain status. 
    As soon as one of the specified services does not match the status, the function returns 'CRITICAL' instead of 'OK'.
-
 .EXAMPLE
    PS>Invoke-IcingaCheckService -Service WiaRPC, Spooler -Status '1' -Verbose 3
    [CRITICAL]: Check package "Services" is [CRITICAL] (Match All)
     \_ [OK]: Service "Ereignisse zum Abrufen von Standbildern (WiaRPC)" is Stopped
     \_ [CRITICAL]: Service "Druckwarteschlange (Spooler)" Running is not matching Stopped
-
 .PARAMETER Service
    Used to specify an array of services which should be checked against the status.
    Seperated with ','
-
 .PARAMETER Status
    Status for the specified service or services to check against.
-
 .INPUTS
    System.Array
-
 .OUTPUTS
    System.String
-
 .LINK
    https://github.com/LordHepipud/icinga-module-windows
-
 .NOTES
 #>
 
diff --git a/lib/plugins/Invoke-IcingaCheckUpdates.psm1 b/lib/plugins/Invoke-IcingaCheckUpdates.psm1
index 50f1e0b..25e61f8 100644
--- a/lib/plugins/Invoke-IcingaCheckUpdates.psm1
+++ b/lib/plugins/Invoke-IcingaCheckUpdates.psm1
@@ -1,12 +1,40 @@
 Import-IcingaLib icinga\plugin;
 Import-IcingaLib provider\updates;
 
+<#
+.SYNOPSIS
+   Checks how many updates are to be applied
+.DESCRIPTION
+   Invoke-IcingaCheckUpdates returns either 'OK', 'WARNING' or 'CRITICAL', based on the thresholds set.
+   e.g 'C:\Users\Icinga\Backup' 10 updates are pending, WARNING is set to 20, CRITICAL is set to 50. In this case the check will return OK.
+   More Information on https://github.com/LordHepipud/icinga-module-windows
+.FUNCTIONALITY
+   This module is intended to be used to check how many updates are to be applied and thereby currently pending
+   Based on the thresholds set the status will change between 'OK', 'WARNING' or 'CRITICAL'. The function will return one of these given codes.
+   
+.EXAMPLE
+   PS> Invoke-IcingaCheckUpdates -Warning 4 -Critical 20
+   [OK]: Check package "Updates" is [OK]
+   | 'Pending Update Count'=2;4;20 
+.PARAMETER Warning
+   Used to specify a Warning threshold. In this case an integer value.
+.PARAMETER Critical
+   Used to specify a Critical threshold. In this case an integer value.
+.INPUTS
+   System.String
+.OUTPUTS
+   System.String
+.LINK
+   https://github.com/LordHepipud/icinga-module-windows
+.NOTES
+#>
+
 function Invoke-IcingaCheckUpdates()
 {
     param (
         [array]$UpdateFilter,
-        $Warning,
-        $Critical,
+        [int]$Warning,
+        [int]$Critical,
         [switch]$NoPerfData,
         [int]$Verbose
     );
diff --git a/lib/plugins/Invoke-IcingaCheckUptime.psm1 b/lib/plugins/Invoke-IcingaCheckUptime.psm1
index ace81c8..147c04a 100644
--- a/lib/plugins/Invoke-IcingaCheckUptime.psm1
+++ b/lib/plugins/Invoke-IcingaCheckUptime.psm1
@@ -2,11 +2,41 @@ Import-IcingaLib icinga\plugin;
 Import-IcingaLib provider\windows;
 Import-IcingaLib core\tools;
 
+<#
+.SYNOPSIS
+   Checks how long a Windows system has been up for.
+.DESCRIPTION
+   InvokeIcingaCheckUptime returns either 'OK', 'WARNING' or 'CRITICAL', based on the thresholds set.
+   e.g 'C:\Users\Icinga\Backup' the system has been running for 10 days, WARNING is set to 15d, CRITICAL is set to 30d. In this case the check will return OK.
+   More Information on https://github.com/LordHepipud/icinga-module-windows
+.FUNCTIONALITY
+   This module is intended to check how long a Windows system has been up for.
+   Based on the thresholds set the status will change between 'OK', 'WARNING' or 'CRITICAL'. The function will return one of these given codes.
+   
+.EXAMPLE
+   PS> Invoke-IcingaCheckUptime -Warning 18d -Critical 20d
+   [WARNING]: Check package "Windows Uptime: Days: 19 Hours: 13 Minutes: 48 Seconds: 29" is [WARNING]
+   | 'Windows Uptime'=1691309,539176s;1555200;1728000 
+.PARAMETER IcingaCheckUsers_String_Warning
+   Used to specify a Warning threshold. In this case a string.
+   Allowed units include: ms, s, m, h, d, w, M, y
+.PARAMETER IcingaCheckUsers_String_Critical
+   Used to specify a Critical threshold. In this case a string.
+   Allowed units include: ms, s, m, h, d, w, M, y
+.INPUTS
+   System.String
+.OUTPUTS
+   System.String
+.LINK
+   https://github.com/LordHepipud/icinga-module-windows
+.NOTES
+#>
+
 function Invoke-IcingaCheckUptime()
 {
     param(
-        $Warning,
-        $Critical,
+        [string]$Warning,
+        [string]$Critical,
         [switch]$NoPerfData,
         [int]$Verbose
     );
diff --git a/lib/plugins/Invoke-IcingaCheckUsedPartitionSpace.psm1 b/lib/plugins/Invoke-IcingaCheckUsedPartitionSpace.psm1
index baed4c8..6d58b45 100644
--- a/lib/plugins/Invoke-IcingaCheckUsedPartitionSpace.psm1
+++ b/lib/plugins/Invoke-IcingaCheckUsedPartitionSpace.psm1
@@ -1,11 +1,52 @@
 Import-IcingaLib core\perfcounter;
 Import-IcingaLib icinga\plugin;
 
+<#
+.SYNOPSIS
+   Checks how much space on a partition is used.
+.DESCRIPTION
+   Invoke-IcingaCheckUsedPartition returns either 'OK', 'WARNING' or 'CRITICAL', based on the thresholds set.
+   e.g 'C:' is at 8% usage, WARNING is set to 60, CRITICAL is set to 80. In this case the check will return OK.
+   More Information on https://github.com/LordHepipud/icinga-module-windows
+.FUNCTIONALITY
+   This module is intended to be used to check how much usage there is on an partition.
+   Based on the thresholds set the status will change between 'OK', 'WARNING' or 'CRITICAL'. The function will return one of these given codes.
+.EXAMPLE
+   PS>Invoke-IcingaCheckUsedPartitionSpace -Warning 60 -Critical 80
+   [OK]: Check package "Used Partition Space" is [OK]
+   | 'Partition C'=8,06204986572266%;60;;0;100 'Partition D'=12,06204736572266%;60;;0;100 'Partition K'=19,062047896572266%;60;;0;100
+.EXAMPLE
+   PS>Invoke-IcingaCheckUsedPartitionSpace -Warning 60 -Critical 80 -Exclude "C:\"
+   [OK]: Check package "Used Partition Space" is [OK]
+   | 'Partition D'=12,06204736572266%;60;;0;100 'Partition K'=19,062047896572266%;60;;0;100
+.EXAMPLE
+   PS>Invoke-IcingaCheckUsedPartitionSpace -Warning 60 -Critical 80 -Include "C:\"
+   [OK]: Check package "Used Partition Space" is [OK]
+   | 'Partition C'=8,06204986572266%;60;;0;100
+.PARAMETER Warning
+   Used to specify a Warning threshold. In this case an integer value.
+.PARAMETER Critical
+   Used to specify a Critical threshold. In this case an integer value.
+.PARAMETER Exclude
+   Used to specify an array of partitions to be excluded.
+   e.g. 'C:\','D:\'
+.PARAMETER Include
+   Used to specify an array of partitions to be included.
+   e.g. 'C:\','D:\'
+.INPUTS
+   System.String
+.OUTPUTS
+   System.String
+.LINK
+   https://github.com/LordHepipud/icinga-module-windows
+.NOTES
+#>
+
 function Invoke-IcingaCheckUsedPartitionSpace()
 {
     param(
-        $Warning,
-        $Critical,
+        [int]$Warning,
+        [int]$Critical,
         [array]$Include               = @(),
         [array]$Exclude               = @(),
         [switch]$NoPerfData,
diff --git a/lib/plugins/Invoke-IcingaCheckUsers.psm1 b/lib/plugins/Invoke-IcingaCheckUsers.psm1
index 370f9c9..d3e6de9 100644
--- a/lib/plugins/Invoke-IcingaCheckUsers.psm1
+++ b/lib/plugins/Invoke-IcingaCheckUsers.psm1
@@ -1,12 +1,44 @@
 Import-IcingaLib icinga\plugin;
 Import-IcingaLib provider\users;
 
+<#
+.SYNOPSIS
+   Checks how many files are in a directory.
+.DESCRIPTION
+   Invoke-IcingaCheckDirectory returns either 'OK', 'WARNING' or 'CRITICAL', based on the thresholds set.
+   e.g 'C:\Users\Icinga\Backup' contains 200 files, WARNING is set to 150, CRITICAL is set to 300. In this case the check will return CRITICAL
+   More Information on https://github.com/LordHepipud/icinga-module-windows
+.FUNCTIONALITY
+   This module is intended to be used to check how many files and directories are within are specified path. 
+   Based on the thresholds set the status will change between 'OK', 'WARNING' or 'CRITICAL'. The function will return one of these given codes.
+   
+.EXAMPLE
+   PS>
+.EXAMPLE
+   PS>
+.PARAMETER Warning
+   Used to specify a Warning threshold. In this case an integer value.
+.PARAMETER Critical
+   Used to specify a Critical threshold. In this case an integer value.
+.PARAMETER Username
+   Used to specify an array of usernames to match against.
+   
+   e.g 'Administrator', 'Icinga'
+.INPUTS
+   System.String
+.OUTPUTS
+   System.String
+.LINK
+   https://github.com/LordHepipud/icinga-module-windows
+.NOTES
+#>
+
 function Invoke-IcingaCheckUsers()
 {
     param (
         [array]$Username,
-        $Warning,
-        $Critical,
+        [int]$Warning,
+        [int]$Critical,
         [switch]$NoPerfData,
         [int]$Verbose
     );