Hi to all, I am having this problem for some time now and it started about a month after I compiled my new pc. I have searched and tried many solutions given over the internet, including the one I found in a similar post in this forum. Symptoms: 1.While in vista,after some time I get a blank screen and then the computer recovers with the message: "Display driver nvlddmkm has stopped responding and was recovered". This keeps appearing more and more often until the computer finally freezes. 2. If I restart the pc I am getting the same problem immediately,however, if I shut it down and turn it on in a couple of minutes,it doesnt appear for some hours.I dont know if this points to any direction. 3.In XP i dont get the blank screen but the computer will crash completely after aproximately the same time. I sometimes get a BSOD with "IRQ not less or equal" or "page file in not paged area" errors. 4.Some programs have stopped working My system: Intel core 2 duo 6700 ABIT Fatal1ty F-I90HD mATX XFX 8800 GTS 2GB teamxtreem 3-3-3-8 RAM Seagate 500GB SATA What I've tried: 1.uninstalling and reinstalling various versions of nvidia drivers 2.Checking the nvlddmkm.sys file in system32, it is up to date 3. Flashing the BIOS 4. Various chipset drivers,currently on latest 5.Checking for overheating,no problem with that 6.Uninstalling ffdshow, as it was suggested on another forum In a few words....HELP!!! Sorry for the lengthy post, I wanted to be as descriptive as possible. Thanx!