Guys please help...here's a topic that I created before, I guess the problem is related to this topic and I hope folks can help to solve my problem.

http://forum.lowyat.net/index.php?showtopic=662848

Here's my PC specification, I just bought a new one.

Intel Core 2 Duo E6750 2.66Ghz 4MB Cache processor
Gigabyte EP35-DS3 motherboard
1GB Kingston DDR2 800 x2 (dual channel) RAM
250GB Seagate SATA HDD
Cooler Master Real Power 620w power supply
Gigabyte GeForce 8800GT 512MB 256bit graphic card

Operating System: Windows XP Service Pack 2

Sometimes, when I log into windows, there will appear "Welcome" and the background is blue color scene, during that part sometime will cause my PC hang a while then immediately restart, is it operating system fault or other else? This problems happen to me after I quite a game, after click Quit button, it back to windows and hang at there, then I've been forced to hold the power button longer to shtu down my PC.

Any way to solve this problem? Is it need to reformat?

Today start my PC again, and it really jumped to a blue screen, stated there that vct3216.dll was not found and cause error, is it need t reformat PC or just insert Windows XP CD to repair?

I cant attach my Minidump file, anyone can let me know what's the reason?

Thanks