After recovering and reclaiming disk space after installing Windows 7 SP1 so that all backup files are deleted, there may still be a service pack related entry that is not clean up and removed. The item is “Service Pack Backup Files” in the Disk Cleanup tool of Windows 7.

Disk Cleanup lists Service Pack Backup Files to allow user to delete and remove the backup files should he or she decides to make installation of service pack permanent, and in the meantime reclaim and recover the disk space occupied by the backup files.

Service Pack Backup Files on Disk Cleanup

In the event the “Service Pack Backup Files” is still been listed on Disk Cleanup tool of Windows 7 with 0 bytes, reniew on My Digital Life Forums has posted a solution on the way to remove the entry via registry.

To clean up the Disk Cleanup tool and remove the “Service Pack Backup Files” listing, just remove the following registry key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\VolumeCaches\Service Pack Cleanup

User can also download the registry registration file (registration at MDL Forums required) that automatically delete the registry key for you.