hi, My window 7 Ultimate OS is hanging after logining into to. After desktop and Task Bar appears nothing more works. Even Ctrl+alt+del also not appears. After a long break it says "Failure to Display security and shutdown options". i have gone through all the options from F8 repair options since 3 days. Opened in safemode and checked the event viewer. i found many errors in it but don't know which is causing this problem. after checking all i found this may be responsible and searched it on google and taken what ever measures they said and got an advance from login screen to desktop and taskbar appearance and hanging there (present situation). Error: Session "ReadyBoot" stopped due to the following error: 0xC0000188, event ID:3, Source: Kernel-Event Tracing. Plz help me. if any info more needed i'll post. i was able to get into safemode. Note: I have a backup at the time of installation after which i have so many updates and softwares installed. If backup is restores 10s of software installation i loose. and esp. i want restore IE, Chrome and Firefox pages to restore. I have done restore point use (only 1 i have). Tried "last known good configuration", disabling some services incl. readyboot. no use.