Hotfix Uninstaller

Hello.

I'm new here.

I am here because I used CCleaner 1.38.485, on my two W2K computers.

The Windows 2000 sp4 uninstall files...and I don't know what else...are gone.

I honestly never, ever considered that any cleaning program would dare touch system files.

My question is this:

How do I get those files back?