I have updated TUGZip to fix the problem with Windows Update KB925902. You may download the new installation package or just the updated TUGZip.exe.
Unfortunately the future of TUGZip does not look very bright at the moment. I need to figure out what to do. Also sorry for the lack of e-mail support lateley, I am to busy to answer all e-mails, please try to search the forum for help instead.