Wireless ? - Most USB Wireless mice are USB 1 technology devices.
Sometimes the receiver unit will become defective. Contact the vendor
of the mouse and explain your situation. In some cases they will send
you a replacement receiver. ( Free or small shipping charge ).
Mice are fairly inexpensive items. You can get a Logitech or MS mouse
for less than $30.

"Janetb" <Janetb@discussions.microsoft.com> wrote in message
news:EFD0C0B3-202C-4DD8-AC38-5FA36994380A@microsoft.com...
> 1. I don't have another computer. If I bring it to a friend's house, it
> will
> probably work at first (as it does on my computer), so I would have to
> work
> there for a while to see if it konks out. Not feasible.
>
> 2. Same behavior on other ports--sometimes it works, sometimes it
> doesn't...
>
> "Singapore Computer Service" wrote:
>
>> Hello,
>>
>> Try the mouse in another computer. If the problem is still there, then
>> you
>> need to replace the mouse.
>>
>> Also try another USB port.
>>