It's confirmed on 3 computers now. Every time I upgrade from ESET Smart Security 4 to ESET Smart Security 5, it breaks my Windows login process. It completely hangs at the login page and it WILL NOT properly allow Windows to log in. I have even done a FRESH install of ESET Smart Security 5 and it still hangs at the login screen after inputting my password. I have to essentially completely uninstall ESET using the ESET Uninstaller from Safe Mode to be able to get back into my Windows operating system. Those of you having this same problem, you can get the uninstaller here: http://kb.eset.com/esetkb/index?page=content&id=SOLN2289 I guess in the meantime, reverting back to ESET Smart Security 4 from the following link fixes my problem: http://kb.eset.com/esetkb/index?page=content&id=SOLN2111 Not a happy camper as I've wasted a lot of time upgrading only to find that it breaks my Windows login process.