Try getting only the keyboard working first. Start with a POWER OFF.
http://support.microsoft.com/?kbid=310575
General USB Troubleshooting in XP - Vista too
http://www.pcbuyerbeware.co.uk/USBProblems.htm
USB & Fire wire Problems
http://h10025.www1.hp.com/ewfrf/wc/f...name=c00820197
Troubleshooting USB Problems
Cumulative Update Rollup for Windows Vista
http://support.microsoft.com/default...en-us%3b936003
Microsoft Knowledge Base Search for USB and Hotfix
http://tinyurl.com/2yebhp
"malski" <malski@discussions.microsoft.com> wrote in message
news:0A8C8D77-A039-47F6-81E6-C338FC0242B4@microsoft.com...
> Today I turned on my computer and noticed that the USB Microsoft 6000
> mouse
> had stopped working. So has the Epson USB printer. Tried everything to get
> them going again but nothing. They have been workiing quite happily for he
> last two months I keep getting message that the device has malfunctioned.
> Changed mouse with another working USB MS mouse off my XP machine still
> nothing. Other posts say click on this, click on that - how if mouse is
> not
> working? Seems a lot of people are having problems with USB devices (my
> sons
> USB mouse has stopped working on his Vista Laptop). Has anyone else found
> a
> solution? Has microsoft found a solution?
> --
> malski