Windows Vista SP1 File Removal tool (Vsp1cln.exe). Vsp1cln.exe is an optional tool that you can run after you install SP1. This tool removes older versions of components that have been updated in SP1, which are stored during the installation in case you need to uninstall SP1 later. Saving these older components increases the amount of disk space that is used. Typically, you should run Vsp1cln.exe if you want to reclaim this disk space after applying SP1 and if you will not need to uninstall SP1. Note, however, that you cannot uninstall SP1 after you run this tool. You can use this tool both online and offline, but you must have SP1 installed and you must use the correct version of the tool. If you are running this file on an offline image, you should use the Vsp1cln.exe included in the Windows OPK or AIK. However, if you are running this file online (on a computer that you are booted into), you should use the Vsp1cln.exe file located at %windir%\system32\vsp1cln.exe.

Awesome. Will do later. Is it safe?

I have not used this nor have I heard of any ill effects. They recommend you wait to be sure you have no issues with SP1 before using this tool.

There was this joke that Vista SP1 would install Windows XP. :hmm:

I have not used this nor have I heard of any ill effects. They recommend you wait to be sure you have no issues with SP1 before using this tool.

Ok, I'll leave it for a while then.

old post, but about a month ago(april) i ran this, and still haven't had any issues with this. So seems perfectly safe to run.

Thanks for the information, Synapse. :wave:

Now on Vista and have used it in VMs as well, this tool is indeed perfectly safe to use.