Assuming you have a Win XP CD, I'd run the sfc /scannow command I alluded to previously. Then be sure to visit MS Updates as the scannow command will set some things back to as was when first installed. No loss of data will occur. If your cd is not inclusive of sp2, you can slipstream a copy to include it and updates. sLLs

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ill try that thanks LL

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This message that appears when when blue screen appears. DRIVER_IRQl_NOT_LESS_OR_EQUAL Technical Information Stop 0x000000D1 C0xBFA56F64,OX00000002,OX00000011,0xBAE66EC ****ATI2CQAG.DLL - ADDRESS BFA56E64 BASE AT BFA17000 DATE STAMP 00000000 ****VSDATANT.SYS - ADDRESS BAE66EC BASE AT BAE41000 DATESTAMP 43798224

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It would have been best to post all errors within the first post. ATI2CQAG.DLL belongs to ATI, I assume you have an ati graphics card. VSDATANT.SYS belongs to ZoneAlarm. You should run some virus and spyware scans regardless of whether you have an up to date AV on your computer. Free Scans: http://www.bitdefender.com/scan8/ie... http://www.windowsecurity.com/troja... http://www.download.com/Spybot-Sear... If you don't have an up to date AV try the free Avast: http://www.avast.com/eng/download-a... If the problem persists, uninstall reinstall ZoneAlarm and ATI drivers. See how the system runs without ZoneAlarm but don't leave your pc without a firewall for very long. sLLs

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sorry about that i didnt clearly check what was the blue screen screen i remember at that time the error d1.I updated my ati driver and uninstall zonealarm, now i need firewall, is sygate firewall good? Thanks for you help LL

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"I updated my ati driver and uninstall zonealarm, now i need firewall, is sygate firewall good?" I believe Sygate is free to try and $40 to buy. I'm not a ZoneAlarm fan because I see on many forums that ZA causes an array of problems for many. I'd give Comodo Firewall –‘Free’a try; I've been running it for several months and Comodo doesn't seem to bog the system down. *Did the re-install of ati drivers and removal of ZA cure your pc problems? sLLs

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Yep no more error occur on my pc

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after 5 days no error from d1. but 00000050 appears with the message PAGE_FAULT_IN_NONPAGED_AREA, and no other error message. This errors randomly appears

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00000050 PAGE_FAULT_IN_NONPAGED_AREA That error would suggest a driver issue. Is there any other information from the error you can post here as that give us a better understanding of what is causing the error. Also the error may have produced a 'dump file'. Here is some info on finding a dump file http://support.microsoft.com/kb/316450 If you could zip and send me the error, I'll try to make some sense if it (check your PM for an email addy). sLLs

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there no other error info then stop 0x00000050 cox00000000 codes i have send the dumo file

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From your dump file, it looks like you are running AVG anti-virus and that is the cause of the error. If you haven't already, run the scan I suggested earlier to be sure a virus isn't causing problems: http://www.bitdefender.com/scan8/ie... Then uninstall/re-install AVG; or use Avast after removing AVG. I prefer Avast over AVG as far as free av's go... 'others may disagree. sLLs

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ill just removed my avg anti virus .i'll just install nod32 together w/ windows default firewall thanks LL you really helped me alot

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Good move getting NOD32. sLLs

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i read articles on nod32 and has a good rating After removing avg, error 00000050 appears with this error win32k.sys address bf8208ac base at bf80200 datestamp 41107f7a first time seeing this win32k.sys

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I'm still thinking avg remnants are causing you some trouble or a driver conflict. There's also some info that p2p programs can cause this; are you running any p2p's? If so, try removing them. Are there any conflicts in the Device Manager? Did you run the sfc /scannow utility I suggested in a previous post? If no luck continue: Go to Windows Explorer and remove the avg folder. Create a Restore Point - Download and install RegCleaner - open the cleaner - the default view of RegCleaner lists all programs installed to the registry - put a check in the avg entries then click 'Remove Selected'- keep RegCleaner open,go to Tools - Registry cleanup - Do them all - when the scan finishes select all items (there will be many) and remove them. sLLs

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There's a LimeWire 4.12.6 installed on my pc that i seldom used, and i have check my device manager there's no conflict[all device is working properly].I'll do sfc /scannow and erased avg folder. there no avg entry and i did the cleaning.And there were minors virus remove.i'll test my pc if errors stills occurs. What causes win32k.sys error?

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"What causes win32k.sys error?" That is the twenty-thousand dollar question. Many things can cause that error; diagnosing the dump file and or the Event Viewer can give a clue as to what caused the problem. As you have experienced, once a problem occurs, it’s like a cancer and many things can go bad. "i did the cleaning.And there were minors virus remove." Enough said. Hopefully we can get everything in order and prevention is the best cure; firewall and Nod32 have you on your way. *very important. Be sure to visit Microsoft Updates after you run the sfc /scannow. sLLs

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minors virus, viruses that was not detected by my antivirus in my files. I'll test my pc if ever error appears again

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After a week, There seem no Blue screen error that appears. Thank you very much for your Help LL

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00000050 PAGE_FAULT_IN_NONPAGED_AREA appears after two weeks. While i was browsing picture with acdsee 4.it's the 2nd i saw this error while browsing with acdsee4

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