Computer is crashing and restarts but no error code?

I may go hours without incident. Then suddenly a restart. I am using Mcaffee A/V with firewall and have scanned for spy/adware. Even messed with video driver. Have done all updates, etc...Computer says it has recovered from a serious error but usually gives no error code. I report it everytime but recieve no repair tips. Should I do a recovery? I even Reinstalled IE7 and scanned registery for errors and repair. Is my video card going to hell? I don't know!!! Bout ready to give up!!!

Computer is crashing and restarts but no error code?agv

It can be a H/W error or some driver errors or some incompatibilities between drivers and the H/W. It is difficult to judge through mails.

Computer is crashing and restarts but no error code?antivirus software

Something like this is typical of memory (RAM) that is beginning to fail, or already has a serious fault. Try replacing your RAM with another known good stick (preferrably a new one).

Another way to test your RAM....get on Google and search for "Ultimate Boot CD". Go to the site, download and burn the CD. There are several memory test programs on there, that work at a low level (in other words, without Windows). You might be surprised at what you find
This is not an answer, but does your event log show any useful information? start%26gt;right click my computer%26gt;manage%26gt;event viewer.
if it was happening to me, i would back up all the important files and do a fresh reload of windows. once you reload the os and your saved files, and the problem persists then it is a hardware issue. make sure when you back up your files that you scan them with a anti-virus software before reloading them on your system, you can never be too safe. good luck
If your computer is not working properly while you are working on it, it could be a problem with device drivers, hardware or software.