I know just enough about tech stuff to be dangerous as my situation will show: Computer is Dell Inspiron e1705 XP media center. 100 gb 5400rpm Sata hard drive Nvidia GeForce go 7800 Received blue screen error nv4-dsp Updated driver for Nvidia GeForce go to 2009 version off Nvidia website Worked great for 2 days 3rd day got blue screen error hardware malfunction call your hardware vendor for support nmiarity check memory parity error system has halted Shut down upon reboot got windows with lines through it screen a few mins then nmi error again After several tries was able to get into safe mode (even safe mode screen was distorted). Shut it down and next day was able to get into safe mode in clear screen After choosing my os in safe mode got full page of errors which started with partition2/windows/system32/drive and other such errors (have photo of screen ) if needed Let me continue so went into device mgr and rolled back driver (saw it change from 2009 to 2005) in device mgr Then shut down and upon reboot it hung for a long time and then booted into windows with lines and the desktop not fully displayed. Then got blue screen error nv4-dsp Shut down again and started up this time black screen. Got windows sound but only black screen. Tried to reboot 2 more times with same result. Please help!!! What do I do???