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Description:  

This policy setting limits the maximum amount of disk space that can be used for the BITS Peercache, as a
percentage of the total system disk size. BITS will add files to the Peercache and make those files available to
peers until the cache content reaches the specified cache size. By default, BITS will use 1% of the total
system disk for the peercache.

       If you enable this setting, you can enter the percentage of disk space to be used for the BITS peercache.
You can enter a value between 1% and 80%.

       If you disable this setting or do not configure it, the default size of the BITS peercache is 1% of the total
system disk size.

       Note: This setting has no effect if the "Allow BITS Peercaching"setting is disabled or not configured.

Supported on: At least Windows Vista.
Limit the BITS Peercache size
Description Gpedit Regedit CMD Back VBScript PowerShell Script
Gpedit:   

Please perform the following steps:

Please go to Pearl button (Start) and click on the Search programs and files
For more information about the change from Start to Pearl button click here
Type gpedit.msc and press Enter
In the Group Policy window please navigate to Computer Configuration -> Administrative Templates ->
Network -> Background Intelligent Transfer Service (BITS) and open Limit the BITS Peercache size.
Not Configured -> is the Default state
Enabled -> apply this GPO
Disabled -> this GPO will not be applied

To finish press ok button and close Group Policy window.
Description Gpedit Regedit CMD Up Back VBScript
Type regedit and press ok
Please confirm User Account Control pop-up
Microsoft official disclaimer

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by
using another method. These problems might require that you reinstall the operating system. Microsoft
cannot guarantee that these problems can be solved. Modify the registry at your own risk.

Note: This registry key is created by Group Policy when this GPO is Enable. The GPO Default state is Not
Configured -> this registry entry is not present. For Disable this registry entry is not present.

Please navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\BITS and locate
MaxCacheSize registry key
Regedit:          

Please perform the following steps:

Please go to Pearl button (Start) and click on the Search programs and files
For more information about the change from Start to Pearl button click here
Description Gpedit Regedit CMD Up Back VBScript
Double click on MaxCacheSize and edit the value:

To Enable:
Change the data value with 5


To finish press ok button and close Registry Editor window

Note: Manual editing of this registry key will not be reflected in Group Policy. If you modify this GPO from
Group Policy this registry key will be rewritten.
Description Gpedit Regedit Back CMD VBScript Up
Type cmd, right click on cmd icon under the Programs and click on Run as administrator
Please confirm User Account Control pop-up
Please select, right and copy a registry key from below, then right click on command prompt window
, select Paste and press Enter

Enabled:
REG add "HKLM\SOFTWARE\Policies\Microsoft\Windows\BITS" /v MaxCacheSize /t REG_DWORD /d 5 /f

Not Configured\Disabled:
REG DELETE "HKLM\SOFTWARE\Policies\Microsoft\Windows\BITS" /v MaxCacheSize /f

Note: Manual editing of this registry key will not be reflected in Group Policy. If you modify this GPO from
Group Policy this registry key will be rewritten.
CMD:          

Please perform the following steps:

Please go to Pearl button (Start) and click on the Search programs and files
For more information about the change from Start to Pearl button click here
Description Gpedit Regedit Back CMD VBScript Up
VBScript:          

Const HKEY_LOCAL_MACHINE = &H80000002
strComputer = "."
Set oReg=GetObject("winmgmts:{impersonationLevel=impersonate}!\\" & _
strComputer & "\root\default:StdRegProv")

strKeyPath = "SOFTWARE\Policies\Microsoft\Windows\BITS"
oReg.CreateKey HKEY_LOCAL_MACHINE,strKeyPath
strValueName = "MaxCacheSize"
'Enabled
dwValue = 5
oReg.SetDWORDValue HKEY_LOCAL_MACHINE,strKeyPath,strValueName,dwValue
'Not Configured
'oReg.DeleteValue HKEY_LOCAL_MACHINE,strKeyPath,strValueName
Description Gpedit Regedit Back CMD VBScript Up
PowerShell Script :          

Enabled

$RegKey = "HKLM:\SOFTWARE\Policies\Microsoft\Windows"
If(Test-Path ($RegKey + "\BITS"))
{
 $RegKey = "HKLM:\SOFTWARE\Policies\Microsoft\Windows\BITS"
 ##Enabled
 New-ItemProperty -path $RegKey -name MaxCacheSize -value 5 -PropertyType DWord -Force
}
else
{
 New-Item -path $RegKey -name BITS
 $RegKey = "HKLM:\SOFTWARE\Policies\Microsoft\Windows\BITS"
 ##Enabled
 New-ItemProperty -path $RegKey -name MaxCacheSize -value 5 -PropertyType DWord
}

Not Configured\Disabled

$RegKey = "HKLM:\SOFTWARE\Policies\Microsoft\Windows"
Remove-ItemProperty -Path($RegKey + "\BITS") -name MaxCacheSize
If( (Get-Item -Path($RegKey + "\BITS")).ValueCount -eq 0 -and (Get-Item -Path($RegKey + "\BITS")).SubKeyCount -eq 0)
{
 Remove-Item -Path($RegKey + "\BITS")
}
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