the red light turns off when I pick it up. The headlight is just a dummy LED. It does shine backwards into the lens of the active device so I see a glow even what it turns off while lifting. Try sneaking a peak while tilting it just a little to see if you find a red glow. I am thinking some of these mice use IR and the LED is more of a power indicator than a functioning part of the mouse. I can't explain why it functions at work but not at home unless these PCs have a more robust 5v at the USB ports. Of course you'll want to check another optical at home. Let us know what you find.
Microsoft optical USB-mouse died. No more red light shining and mouse pointer on the screen didn't move. That seemed logical to me. After all, an optical system needs light to function. It was only 3 month old, but a birthday present, so I couldn't return it. Bad luck.
Tried it on different ports. Same story. Tried it on a laptop. Same story.
Took it to my work as a last resort to replace a bad mouse there. Still no red light shining. Everything dark, totally dark. Functions very well, however. Perfectly, in fact, although I didn't the install the right driver yet, so button #4 and #5 don't work.
Can anybody explain why it works there and not here? Or, maybe better, can anybody explain why it works?