Hello! I am having big problems with my computer for quite a while, tried what I know, been reading in some places but found no solutions and will be very happy if someone finds a way to help out. PROBLEM: The thing is my computer stop working randomly in one of 3 ways- 1. Just stops responding. screen freeze, keyboard and mouse unusable, sometimes a red horizontal line appear at the top of the screen. must restart from button. 2. self-restarting. no signs, just a sudden restart. 3. BSOD. some diffrent kinds: IRQ_NOT LESS_OR EQUAL / PAGE_FAULT_IN_NONPAGED_AREA / no-title - 0x0000007E one of the above happens 4 to 10 times a day. sometimes reapetedly sometimes with big gaps. Info and attempts to solve: I use winXP SP2 on a p.4 2.4GHz + 256 MB RAM. lg cd-rom, nec dvd-rw, 60 GB hdd (2 gb free on the sys partion, 5 free on the data partion), nvidia geforce4 440 mmx. only hardware change before it all started was a cm-922d lcd monitior wich replaced my old CRT monitor. but can a monitor cause such problems?? I assume no. I havn't installed anything new before it started but anyway i've uninstalled any unneeded software. I have NOD32 and MS-Defender up-to-date and running, windows auto-updates on. I've monitored CPU-tmp and it doesn't go much above 50C. tried a free-memory program wich didn't helped. run memtest for 1-2 hours and found no errors. I've listed down the detailes of the bsod's and will attach in a txt, also only sometimes after a crash it says "windows have recoverd from a critical error" and gives info, will attach that as well. I thougt it might be the geforce4 so i've uninstalled and use the on-board video card. it doen't help as well. If there is more information that can help find the source of the problem and I left it out pls tell me and I'll post. Thankyou for your time, Danken.