07.07.2013, 19:21
From experience I can tell that Vista service packs are a pain in the ass. Service Pack 1 should install automatically through Windows Update, but I've had several cases where it just bugged out. The neatest solution would be a fresh install of - preferably - Windows 7 or Windows 8. All folders and files will be retained but the registry will be wiped so you might have to reinstall several applications.