WIndows 7 professional will try and update with Visual C++ 2008 SP1 redistributable x64 but during the installation it errors out with code 1395 and 0x80070091 for VC90_ATL. Searching the internet these were the proposed solutions. 1). MSOFT KB2714434 Fixit 2). download and run SubinACL on the registry//directories with system and administrator set to full priveleges. This seemed to work on changing most registry entries without error but not all. Items 1/2 didn't correct the problem even when running the C++ 2008 redistrib as a user with Administrator privelges or using "run as". 3). Ran MSOFT KB947821 dated Oct 27, 2014 which is a tool to correct errors and hopefully allow software with SP1 to install and work without problem. I'm not sure what it actually corrected, but C++ 2008 redistribut still didn't install. 4). Tried to install the non-SP1 C++ 2008 redistribute then the SP1 version for x64. It failed to install the non-SP1 version. What worked. Disable the 3rd party anit-virus and the Win 7 firewall and it will install. Both have to be disabled temporariliy. Disabling only one of them will not allow C++ 2008 Redistributable to install.