Ok, I used to have this awhile back and I posted about this very similar incident and it stopped for a long time. It has now started again but worse. I will sometimes be sitting at my desktop or surfing the internet or browsing through my hard drive, and then my computer will just freeze for about 4-6 seconds and then sometimes it will just blink very quickly return to normal. Other times, it will go black and then my monitor will act like it can't see the graphics card. Sometimes at this second thing, it will do that for a few seconds then return to normal, and other times it stays that way until I restart my computer. Sometimes my computer won't do it at all for a long period of time. Something that almost always seems to freeze my computer up, is the screensaver. I have Starfield as my screen saver and it never caused any problems before but it is now acting very strange. I have an MSI Nvidia 6600 GT and I checked the Nvidia's website for drivers and updated it, but it is still doing it, although it seems to be doing it less now. This is very strange and extremely disruptive to the usage of my computer so any help or suggestions would be greatly appreciated. Thanks!
Does this happen only in desktop or whilst gaming aswell?
Well it seems mostly to happen at my desktop but in the past day its not done it at all.
The "blinking" you mentioned might suspect me to believe the power supply is starting to fail. Or it is a heat issue.
My computer previously was very hot but I added another fan and inverted two of the fans to blow air in and the third to blow it out the back. As I have said whatever the issue was is not really doing it now. I have a 350 w Power Supply so I thought it was sufficient enough to power my computer, but I dunno if I should upgrade it or not.
Run a few different benchmarks and monitor the temp. If its a hardware fault or temp issue benchmarks might trigger it.
Do the math and see if you need a more powerfull PSU! :)
AMD Athlon XP - 60W-72W AMD Athlon XP Tbred - 50W-75W AMD Duron 1.0-1.3Ghz - 50W-55W Intel P3 800-1.4Ghz - 25W-40W Intel P4 1.4-20Ghz - 55W-75W Intel P4 Northwood - 55W-70W Intel P4 3.06Ghz+ - 75W Intel Celeron FC-PGA/FC-PGA2 - 25W-35W Intel Celeron Skt. 478 - 45W-55W ATX Motherboard - 40W-65W AGP Video Card - 30W-70W PCI Video Card - 20W-35W 256MB RAM - 20W 512MB RAM - 35W IDE CD-RW Drive - 25W-35W SCSI CD-RW Drive - 20W-25W IDE CD-Rom - 20W-30W SCSI CD-Rom - 15W-20W IDE DVD-Rom - 20W-25W IDE Hard Drive - 15W-20W SCSI Hard Drive - 15W-25W 15,000 RPM SCSI Hard Drive - 35W Floppy Drive - 8W Network Card - 5W Modem - 5W Sound Card - 5W-10W SCSI Controller Card - 20W FireWire Controller Card - 30W-40W USB 2.0 Controller Card - 5W-20W Case Fan - 3W CPU Fan - 3W
Sounds Like the cards fried, mine did that a while back only answer was to replace the graphics card.