SP1 installed twice

[HELP]

Hello I installed sp1 twice by accident. Now my usb mouse
doesn't work. Also I did not archive my files. Is there
any solutions except for reformatting everyting?

Thanks

 

[Jupiter Jones [MVP]]

Installing SP 1 more than once really makes no difference since the
files overwrite old files instead of adding to existing files.

Reinstall the mouse drivers.
Delete the mouse from Device Manager and reboot.