I have an Macbook Pro with an Intel processor, which I have partitioned as a dual boot and have Windows 7 Ultimate X64 installed. This setup has ran fine until last week. I installed an old Guitar DVD course, and the default video player was Windows Media Player. For some reason the videos would only play sound but no video. The videos would play fine if I went to the folders and used a different media player, but within the lessons software it by default used Windows Media player. I tried updating all the codecs to play avi files but with no luck. I read where it was a known issue with WMP 12, and rolling back to WMP11 usually solved the issue. I found an older version of WMP 11, but I think it was infected with malware, and I was caught in an infinite boot loop where Windows wouldfind a problem, try to repair it, and couldn't, and reboot only to keep doing that over and over. I ran /fixmbr and /fixboot and managed to get out of the boot loop, but now I keep getting an error "Windows is unable to start due to a missing or corrupt file Windows\SysWOW64\Drivers\SZKG64.sys From researching some it seems to be a driver from an antivirus\spyware program I have installed called StopZilla. I've looked everywhere for some way to get past this but can't seem to find a solution. Also I have ran three different rescue cd's and nothing has shown up. Any advise? Thanks.