I built my current computer about a month ago and everything was working fine, but to day i rebooted and was stuck in 1024x768. My gtc260 has worked perfectly before, and i didnt change anything when rebooting, so i dont know what happened. I reset my bios but that didnt work. Its not a driver issue because i dual boot and it is the same on both OSs. Specs: GA-EP45T-UD3LR Q8400 eVGA GTX260 (core 215) OCZ Mod Xstream 700w psu 4gb crucial ddr3 (1333) 2x 250gb 7200rpm WD Sata HDD Lite-On sata dvd-rw drive
Probably a monitor driver issue. Check your windows update list and see if it recently installed a driver update for your display.