So I'm not sure what could have caused that in my case (XP here too). I cleaned temporary files and have made a defragmentation of disks, but I as well installed / uninstalled and updated a few applications. I usually run without a half of services during usual work that are run in auto mode (like Windows updates, time synchronization, scheduled tasks, system restore, etc., which I stop 2-5 minutes after system start). Anyways, I just run a debugging session without problems, so something had fixed my problem permanently, but I don't know what, and I didn't reinstall Visual C++ at all.
Strange is that I didn't change any settings in my antivirus software, but it updates automatically everyday, with not only definitions, but sometimes engine too, so maybe some changes in the antivirus engine caused it for me for some time (but it could be my firewall too, as it also protects against direct access to memory, etc.).
