Just thought I'd relay my experience with a similar problem I had. I wasn't able to get into windows through regular startup or safe mode, it would just blue screen right after the windows loading screen appeared. Also, couldn't get into recovery console through the XP CD, it would also blue screen when loading. So I went into my bios and somehow my SATA HDD mode had been changed from compatibility mode to enhanced mode which apparently doesn't work in my system. Changed it back to compatibility and all is well. I think I cleared my CMOS by mistake.