Open Keyboard by clicking the Start button, clicking Control Panel, clicking Hardware and Sound, and then clicking Keyboard.
Under Character repeat, move the Repeat delay slider to the left to increase the amount of time you must hold down a key before the keyboard character repeats. Move the slider to the right to decrease the amount of time before characters repeat.
Try that out, and let me know, thanks!
Click Start, point to All Programs, point to Accessories, point to System Tools, and then click System Restore.
On the Welcome screen, click Restore my computer to an earlier time, and then click Next.
On the Select a Restore Point page, select the date from the calendar that shows the point you'd like to restore to, and then click Next.