WinXP - standby option in shutdown menu disappeared

[firewall]

Just as it says in the title, the standby option in the shutdown menu disappeared after some driver installation. This driver was Mirascan 3.XX for Acer Scanprisa 640P on Winxp. I uninstalled it later but it didn't uninstalled completely and gave error at end of installer.
How can I get the standby option back without reformatting the HD and reinstalling the OS(winxp)? If any other queries please ask to help me solve this problem.

 

[firewall]

Anyone?????

 

[InlineFive]

Try reinstalling your mobo drivers.

 

[firewall]

I thought WinXP included the drivers for mobo. When I installed WinXP, it didn't ask for the driver cd. Rather it had drivers with microsoft as provider and theyworked fine. Never gave me a problem. This probably has something to do with the scanner drivers which weren't uninstalled successfully.
Any other suggestions?

 

[Bucksnort]

install the mirascan again then uninstall it in safe mode. Next uninstall your video driver and reinstall.

 

[firewall]

thanks for all the sugestions. I used a restore point to revert to previous settings. It works!!!!