[SystemFileProtection] (Unattend.txt)

[SystemFileProtection]

The [SystemFileProtection] section contains entries for specifying a new feature in Microsoft® Windows® XP called Windows File Protection (WFP). If this section is missing or empty, Setup installs WFP using default values. By preventing the replacement of essential system files, WFP avoids file version mismatches. It runs in the background on a Windows XP system, and protects all .sys, .dll, .exe, and .ocx files that ship on the Windows XP CD, as well as the TrueType fonts Micross.ttf, Tahoma.ttf, and Tahomabd.ttf.

Note

In earlier pre-release versions of Windows XP, WFP was known as System File Protection or System File Checker. Entry naming conventions still use this nomenclature.

WFP initiates when Setup attempts to:

Replace a protected system file.
Change a protected folder or a file in a protected folder. (WFP then determines which file changed.)

Windows File Protection (WFP) also checks version control of protected files. It looks up the file signature in a catalog file to determine if the new file is the correct Microsoft version. If the new file is not the correct Microsoft version, WFP looks for the replaced files by searching for them in the following order:

The Dllcache folder.
The network install path (if you install the system via network install).
The Windows product CD.

Entry	Description
SFCDllCacheDir	Specifies the folder that WFP uses to cache the system files (the \Dllcache folder location).
SFCQuota	Specifies the cache size of the Dllcache file stored on the system hard disk.
SFCShowProgress	Specifies whether System File Checker displays a progress meter during file system scans.

Sample

This sample demonstrates one use of the [SystemFileProtection] section of Unattend.txt.

[SystemFileProtection]
SFCDllCacheDir = %SYSTEMROOT%\Windows\System32\Dllcache
SFCQuota = FFFFFFFF
SFCShowProgress = 1

SFCDllCacheDir

Specifies the folder that WFP uses to cache the system files (the \Dllcache folder location).

Syntax	SFCDllCacheDir = location of Dllcache folder
Values	location of Dllcache folder
Default Value	%SYSTEMROOT%\%WINDIR%\System32\Dllcache
Example	SFCDllCacheDir = %SYSTEMROOT%\Windows\System32\Dllcache
Comments	This path must be a local path. This entry also allows environment variables. Important You must put quotation marks around the value you provide.

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SFCQuota

Specifies the cache size of the Dllcache file stored on the system hard disk.

Syntax	SFCQuota = size in MB (hexadecimal)
Values	size in MB (hexadecimal)
Default Value	0xFFFFFFFF
Example	SFCQuota = FFFFFFFF
Comments	If you specify 0xFFFFFFFF, this entry caches all system files in the Dllcache folder.

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SFCShowProgress

Specifies whether System File Checker displays a progress meter during file system scans.

Syntax	SFCShowProgress = 0 \| 1
Values	0 Does not display progress meter during file system scans. 1 Displays progress meter during file system scans.
Default Value	0
Example	SFCShowProgress = 1

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