Works for me !

I found this at a discount store that buys items in Big Lots. The price seemed right 15.99 so I went for it. I have XP and even though the initial setup did not follow instructions ( could not access the setup by typing in the command prompt ), I found it on the A drive and clicked setup icon. After, I got a blank, black screen with a message about something not valid and just push any key to continue. No Luck! But, the control-alt-delete brought all back to normal. All is well now and mouse working well. So far , so good. Pushing side buttons is a bit weird, but rocks the back and forth command in the browser.So, all in all, not bad!Just remember that during install you will NOT have ANY mouse controls. Might be best to install while your computer is running.