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Windows XP Tips, Illustrations and registry edits
The following folders are created when you install a Service Pack for Windows XP (SP1, SP1a or SP2):
%systemroot%\Servicepackfiles
%systemroot%\$NtServicePackUninstall$
Folder name that contains random characters, for example,
9470bb12e8a4f3447657236478e41c5
Servicepackfiles : This folder contains files that are required when you add or remove optional Windows components. This folder is also used by Windows File Protection (WFP) to replace damaged or changed protected system files. IMPORTANT: Do not delete this folder.
$NtServicePackUninstall$ : When you install the service pack and choose to archive the files you need to remove the service pack, Windows automatically creates a backup. This is a backup of the files and settings that the service pack installer changes, and which are saved in the %systemroot%\$NTServicepackUninstall$ folder. You can use the contents of this folder to return your computer to its previous state. If you delete this folder, you cannot remove the service pack. If you are sure that you will not want to remove the service pack, you can safely delete this folder. If you delete the %systemroot%\$NtServicePackUninstall$ folder, the option to remove the service pack still appears in the Add or Remove Programs tool in Control Panel. When you try to remove the service pack, you may receive an error message. IMPORTANT: Do not delete this folder unless you are sure that you will not want to remove the Service Pack in the future.
Windows XP Service Pack Installation Temporary Files Folder : Folder name with random characters. This folder is not required after you install the service pack, and you can safely delete this folder. When you install Windows XP SP1, SP1a or SP2, this temporary folder is created on the volume that has the most free space. The folder name contains random characters, and is not always created on the same volume as the Windows folder. For example, this temporary folder may have the following random names:
9470bb12e8a4f3447657236478e41c5
or similar.
352b81d1c4bf3810e28482d9979
This folder is automatically deleted by Windows XP after you install the service pack. However, if the folder is not automatically deleted by Windows XP, you can safely delete this folder. In most cases, you will receive an Access denied message while accessing or deleting this folder. First, you'll need to Take Ownership of the folder and then delete it safely.