PC lagging after failed norton install.

Keystroke lag as well as scroll lag among other usual latency issues. Need Help. Appeared to have started after a failed Norton install. No BSOD just severe latency.

Try System Restore and restore the PC back to a date prior to the failed install. That MAY fix it.

System Restore can be accessed from Start/Programs/Accessories/System Tools. System Restore will not delete any user data or e-mails and there is even an Undo function if it doesn't help.