PC Crashing, I got Pentium D 2.66ghz 80gb hard disk, 512 ram (all good I mean) some months back. Now it crashes occasionally and unlike usual system crashes it doesnot restart. Monitor says no signal and computer is not restarted andi cannot turn it on with its power button. The only solution is to turn the main switch off and then turn it on again, this makes it restart with scan disk in the beginning. I ran all the tools I knew to keep it running smoothly. I have stabilizer and my two pcs runs on it (one at a time) this crashing doesnot happen with my other system. Please help me out I am worried about my brand new PC

Regards

Sounds like a bad power supply if it won't restart normally. If it's new take it back and they will fix it.