My PC (running XP) doesn't seem to want to allow installation of 3 fairly recent Windows Updates (KB840374, KB828035 and KB824141). They appear to download ok - but all fail at the installation stage. I've tried to install them all several times without success.
I spent considerable time trying to install 330994 without success - kept getting the Quick Fix Engineering error message panel up - only to discover, when I decided to redownload it, that I had originally attempted to use the XP Pro 64 bit version...:-(
If the above doesn't resemble your problem or it doesn't work, you could try d'loading the patches separately to your hard disk & double-clicking the saved files to install one at a time. To d'load individually: KB840374 - click here (if it doesn't install correctly click here), KB828035 - click here, KB824141 - click here. HTH, G