usb keyboard/mouse turns off

hi,

Im having ongoing problems with my usb hardware, it seems my mouse and keyboard are acting very tempremental and turning themselves off then on randomly for seconds at a time. ive updated the drivers and tried everything that ive thought of to no avail. im assuming its a usb issue.

i have an optical intellimouse explorer 3.0

any help or suggestions would be much appreciated
thankyou in advance
Neil

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Toughen up bitch or i'll buy you a skirt.