Trying to install Eset Smart Security 126.96.36.199 64bit on Windows 7 Ultimate 64bit, and it fails by ending prematurely and rolling back. Error message is a very unhelpful 1603, which is a generic failure. It's an HP Elitebook 2740p, with a fresh install of Windows 7 Pro 64bit, then anytime upgraded to Ultimate, and HP drivers loaded. Have tried with UAC disabled, and generated logs (which ESET UK now have and are passing onto Global). Never had a problem installing ESS before, but then haven't installed a 64 bit version, onto Windows 7 Ultimate before. Search this forum and tried the suggestions of the Eset Uninstaller, can't find the Infcache file in one suggestion, still no luck. Bit annoying to say the least.