Limit the BITS Peercache size: registry value MaxCacheSizeComputerHKLM\Software\Policies\Microsoft\Windows\BITS
- Policy ID
- BITS_MaxCacheSize
- Scope
- Computer Configuration
- Supported on
- At least Windows Vista
- Source
- Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
- Category
- Network › Background Intelligent Transfer Service (BITS)
Registry
MaxCacheSize
REG_DWORDComputerHKLM\Software\Policies\Microsoft\Windows\BITS Current key
- Enabled value
- Depends on the option value
- Element
- Percentage of disk space to be used for the BITS peercache:
- Value type
- REG_DWORD
- Required
- true
- Minimum value
- 1
- Maximum value
- 80
Apply with .reg · CMD · PowerShell
.reg
Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\BITS] ; Value names and types follow the ADMX. Replace <enter value> below with your own data "MaxCacheSize"=dword:<enter value>
CMD
:: Value names and types follow the ADMX. Replace <enter value> below with your own data reg add "HKLM\Software\Policies\Microsoft\Windows\BITS" /v "MaxCacheSize" /t REG_DWORD /d "<enter value>" /f
PowerShell
# Value names and types follow the ADMX. Replace <enter value> below with your own data New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\BITS' -Force | Out-Null New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\BITS' -Name 'MaxCacheSize' -PropertyType DWord -Value '<enter value>' -Force | Out-Null