this is a freinds computer he was getting a blue screen saying bad-pool-header, so i figured it could be program confliction or virus so i restore the system, deleting all partisions first. Reformating with xp pro this didn't work (note he has no recorce disk). He said he added ram for a recording program, and it never went to the blue screen before he installed it, but he got ram from pc store and they looked up the specs he needed. 1- system failer, his computer keeps reseting it's self or comming to the blue screen of death saying "bad-pool-header" I sent a error report and saved what it brought me to. This got so bad the computer kept reseting itself before windows even loded. C:\WINDOWS\Minidump. four files atached. 2-"service pack has encountered a problem and need to close" this has happend servil times. but not recently. 3-"inernet explor has encountered a problem and needs to close" again happened servil times. 4- network controler is not reconized in the device management. I used add new hardware wizard and conected to the inernet winh my linksys external card, windows cannot find software . I believe this is need for him to connect to wireless. Also multimedia audio controller, pci modem, viedo controller, video controller (vga compatible) none of theses are reconiced. I have looked driverguide and everywhere cant find anything. He has a dell Inspiron 2200 laptop. 5- hardley any programs will install, they are saying file is corrupt. It done this before i reformated his computer too. Itunes wont install, is says quick time is needed to run itunes. I downloded it, but it gives me an error reading of "The cabinet file quicktime.cab required for this installation is corrupt, this could indicate a network error, an error reading from the cd-rom, or problem with the package. Ad-ware is all i got to install. microsoft's error report Problem caused by Device Driver You received this message because a device driver installed on your computer caused the Windows operating system to stop unexpectedly. This type of error is referred to as a "stop error." A stop error requires you to restart your computer. More information Problem report summary Problem type Windows stop error (a message appears on a blue screen with error code information) Solution available? No What does this problem mean? Windows has encountered a problem it cannot recover from and it needs to be restarted Cause Unknown Computer symptoms A message appears on a blue screen with error code information (for example: 0x0000001E, KMODE_EXCEPTION_NOT_HANDLED) Additional steps for you to take Please continue to send problem reports so analysts at Microsoft can study and try to correct the problem as quickly as possible how to trouble shoot driver problems in xp http://support.microsoft.com/?kbid=322205 Maybe someone can suggest some program to test all the drivers?