Hi, for the past few months, I have been having problems with games crashing. Over the summer, I upgraded my computer with a new stick of 512 MB RAM, (as far as I know identical to the other), a GeForce 6600 GT (Video BIOS Version 5.43.02.39), and a new 450 Watt power supply. After doing this, my computer grew very unstable. Eventually, I tried reformatting my hardrive, and starting over (my version of windows XP at this time was cracked and I had lots of cracked software on my pc), I started over with a new, licensed version of Windows XP, with all my new hardware. MY PC continues to be unstable. Periodically, I get strange red lines flying off of things on my screen, then they flutter and go away. Also my computer reboots randomnly and when I send the error report it says it was caused by a device driver. All my device drivers are up to date. I've reinstalled my Nvidia drivers and everything else many times. Half Life 2 crashes after a few minutes of play. Doom 3 won't let me play for more than 1 minute and a half before crashing. I've attached an error message I've received with HF2, looks like an error with some point in memory. I can't seem to find a solution for all this madness. I also had problems with IE. An error message came up about Dr. Watsons PostMortem Debugger. I have no idea what's going on. I've done many scans and all adware on my computer is deleted. No viruses have shown up either. I AM PERPLEXED! HELP!!!!!