In Windows 7 and Windows Vista, Startup Repair has replaced the Repair Installation option that was available in Windows XP. Startup Repair replaces only damaged or missing Windows startup files. In a Windows XP Repair Install, all Windows files are replaced no matter if they work or not.
NOTE: System Restore and System File Checker in command prompt is available in Startup Repair.
Clear The CMOS
Clearing the CMOS will reset your BIOS settings to their factory defaults. It solves certain hardware compatibility issues.
To clear the CMOS, Enter the BIOS setup utility and choose to "Reset BIOS Settings" to their factory default levels.
Another way to clear the CMOS is to short the "CLEAR CMOS" jumper on your motherboard. These jumpers are usually located near the BIOS chip itself or near the CMOS battery.
You may also clear the CMOS by reseatting the CMOS battery on your motherboard.
NOTE: If your computer is running three or more years, you may want to replace your CMOS battery.
Reseat power cables, memory card(s), expansion card and external devices as well.
Reseatting in computer is done by unplugging or removing a hardware component then plugging it back again.
Reinstall Your Operating System
Consider this only as your last option, if your computer still returns to Advanced Boot Options.
CLICK HERE on how to properly reinstall your operting system.