[Uninstall] (Unattend.txt)

[Uninstall]

The [Uninstall] section contains entries for allowing end users who upgrade to Windows XP to remove the operating system if they encounter problems.

This section header instructs Setup to create a backup file of the end user's existing operating system. You must specify this section to make the Uninstall feature available.

Important

Consider the following restrictions with the Uninstall feature:

Setup does not support Uninstall if the number of partitions or the file system changes.
Setup supports Uninstall only for upgrades of Windows 98, Windows 98 Second Edition, or Windows Millennium Edition.
End users who upgrade from Windows 4.0 or Windows 2000 to Windows XP Home Edition or Windows XP Professional cannot uninstall the operating system.
End users can uninstall the operating system if Setup does not complete successfully.
After Uninstall, some applications installed with or upgraded to Windows XP may not work. However, Uninstall does not affect any user data created with the new operating system.

For more information on upgrades from Windows 98, Windows 98 Second Edition, or Windows Millennium Edition, see [Win9xUpg].

Entry	Description
DisableCompression	Specifies whether to compress the files in Backup.cab.
EnableBackup	Specifies whether to create a backup file (Backup.cab) for removing Windows XP Home Edition or Windows XP Professional.
PathForBackup	Specifies the location of the backup files of the previous Windows 98, Windows 98 Second Edition, or Windows Millennium Edition.

Sample

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

[Uninstall]
DisableCompression = Yes
EnableBackup = Yes
PathForBackup = "%SYSTEMDRIVE%\Backup"

DisableCompression

Specifies whether to compress the files in Backup.cab.

Syntax	DisableCompression = Yes \| No \| Auto
Values	Yes Does not compress the backup files in Backup.cab, located in the folder specified by PathForBackup. This setting speeds up an upgrade to Windows XP Home Edition or Windows XP Professional. No Compresses the files in Backup.cab to approximately 40 percent of their original size. Auto Checks the available disk space. If there is sufficient disk space, do not compress the backup files in Backup.cab. If there is not enough disk space for all of these uncompressed files, then compress the files when storing them in Backup.cab.
Default Value	Auto
Example	DisableCompression = Yes
Comments	The [Uninstall.DiskSpaceEstimation] section in Win9xupg.inf controls the compression factor. If `EnableBackup = No`, Setup ignores this entry.

icon Return to top

EnableBackup

Specifies whether to create a backup file (Backup.cab) for removing Windows XP Home Edition or Windows XP Professional.

Syntax	EnableBackup = Yes \| No
Values	Yes Creates Backup.cab in the folder specified by PathForBackup. No Does not create Backup.cab.
Default Value	Yes
Example	EnableBackup = Yes

icon Return to top

PathForBackup

Specifies the location of the backup files of the previous Windows 98, Windows 98 Second Edition, or Windows Millennium Edition.

Syntax	PathForBackup = path_for_backup_files
Values	path_for_backup_files
Default Value	system_drive:\Undo
Example	PathForBackup = "%SYSTEMDRIVE%\Backup"
Comments	Setup accesses these files if the end user chooses to remove Windows XP Home Edition or Windows XP Professional. In the PathForBackup entry you must specify a location on the computer's hard disk. You cannot specify a network server share or a removable mass-storage device. Enclose path_for_backup_files in quotation marks if it is a long file name. If EnableBackup = No, Setup ignores this entry.

icon Return to top