thank you all for time o read ...i had windows 7 32-bit for about a year and everything was great untill i got new card ATI Radeon HD 2600 Pro AGP (i know its old and i will buy new system soon so dont judge me on that one ).after installing the driver for win7 i started playing cod4...all cool....untill one day i got this blue screen error that said IRQL_NOT_LESS_OR_EQUAL (that call of duty 4 was transfered from another pc with my phone) and today i thought that maybe uninstalling win7 and going back to winxp will allow me to play those games so i installed it (i know not smart choice but many people told that windows 7 has many issuess with ATI Radeon Hd 2600 Pro AGP).now after installation i got the SAMP from my iPod (old one i use it for storage 20 GB) and again i got that same error again...so i was wondering could it be because my games were transfered from other pc's or something else is to blame??anyway thank you for reading and im looking forward to ur replies