I had to download Quicktime to render videos for TF2. I restarted my computer to make sure it would take effect but when I did, I got some form of a blue screen and my computer instantly started rebooting. It happened again, so I went into Safe Mode and started a virus scan, assuming I had contracted a virus somehow, but decided on a whim that maybe a System Restore would work better. I stopped the virus scan, Restored to right before I installed Quicktime, and it booted fine. I didn't download or install anything else between installing Quicktime and restarting. Is it possible Quicktime is to blame? (Yeah yeah I know "lol quicktime" and all that stuff but I'm genuinely curious)