Iâ€™m having a weird problem with my PC. Iâ€™ve recently upgraded my PC to P IV 2.8 GHz (HT) with Intel D865GBF Motherboard and 256 MB DDR RAM (400 MHz FSB). My Os is Windows XP Professional with SP2. My problem is, sometimes, when I start the machine, instead of booting a blue error screen appears which says â€“ â€œA problem has been detected and Windows has been shut down to prevent damage to your computer. DRIVER_IRQL_NOT_LESS_OR_EQUAL If this is the first time you are watching this screen restart your machine. If the problem persists uninstall any new hardware or software that you have installed. Technical Information- ***STOP: 0x000000D1(0x7C844BF5,0x00000002,0x00000000,0x7C844BF5) If this does not fix the problem contact your Administrator.â€? This doesnâ€™t only happen at startups; sometimes when Iâ€™m working suddenly the machine restarts and the same screen appears. Some of the softwares that I use are System Mechanic, Zone Alarm, SpyBot Tea Timer, EZ Antivirus, Hare, Tweak XP, Free RAM XP Pro, XP Anti Spy. Could some body give any clue whatâ€™s happening here!