here are more details... This is my personal computer only 3 weeks new. Win7 Pro 64bit, 6G ram, Intel i7 950, 128G SSD drive. Had AVG free 9.0.856 and MBAM 1.46 paid version with exceptions in AVG so MBAM was working good. Installed avg_free_x64_all_2011_1120a3152.exe --------------------- Why does the 64 bit version install to Program Files (x86)?? C:\Program Files (x86)\AVG\AVG10\ Install failed uninstalling AVG 9 with error: Product: Microsoft Visual C++ 2008 Redistributable - x86 9.0.30729.4148 -- Error 1935.An error occurred during the installation of assembly 'Microsoft.VC90.MFC,version="9.0.30729.4148",publi cKeyToken="1fc8b3b9a1e18e3b",processorArchitecture ="x86",type="win32"'. Please refer to Help and Support for more information. HRESULT: 0x80070091. assembly interface: IAssemblyCacheItem, function: Commit, component: {AFA 31654-361E-33B5-9ED5-049A6889325C } Tried again: -------------- uninstalled AVG 9 from program uninstall menu Installed 2011 again... computer froze up after it installed and was updating (conflict with MBAM realtime?). Had to reboot. no avg icon in tray no uninstall avg icon in "uninstall programs" open avg icon on desktop and get error "key is not activated" (probably just did that because the program was not loading correctly) Try to reinstall AVG 2011 again to see if it can repair itself: ---------------- Product: AVG 2011 -- Error 1921. Service 'AVG WatchDog' (avgwd) could not be stopped. Verify that you have sufficient privileges to stop system services. I restored the whole system drive C with last nights Acronis backup because I do not like tht messed up install that could not be uninstalled. Back to AVG 9 indefinitely, or try Avast? I am trying Avast on a test system, is Avast compatible with MBAM realtime?