i recently installed windows 7.. when i installed VIA drivers for graphics it didn't get installed properly... i had the message "setup was unable to complete the installation (err code-6) ".. so i was asked to upgrade my BIOS... i downloaded it and installed it... when i ran the update, the system just hanged up and nothing happened for hours,.. so i had to restart the system and went to BIOS settings and clicked load optimized settings,,,.. from then onwards my OS is booting until the windows startup screen appears and just hangs..it's not booting to the users login... but it logs in at times... i dont have any restore points too..what to do?