Windows 7 - Logitech Wireless Mouse Problem

I just purchased a Logitech M505 Wireless Laser mouse. My computer is an i7 Core machine with Windows 7 64-bit Home Premium. Inserting the USB receiver plug caused the normal driver install process which was successful. However, no mouse action at all. I've tried different USB slots to no avail. My Microsoft laptop wireless mouse works fine, from all the same USB slots. The M505 does work on another computer running in the house (laptop with Windows 7 64-bit Professional).
Don't believe it's the mouse itself. I originally bought the M705 model and took it back when I couldn't get it to work, thinking it was defective (the same conclusion reached by Logitech Tecnical Support). They were out of stock for the M705 so I replaced it with the M505, only to get the same result.

If you haven't already I would install the latest Logitech software/driver for it. If its a Logitech Unifying Receiver installing the unifying software may help you get it connected and working. I have a Logitech Wireless Trackball M570 that uses a Unifying Receiver. I was pleasantly surprised to see that it actually worked while installing Windows 7. Even so I installed the latest unifying software anyway. Windows 7 Home Premium 64 bit.

Thanks. Actually, I did do that in the first go-round. The receiver dialog attempts to recognize the new device but eventually times out.

Maybe you have some interference near that machine that is affecting Logitech mice.

Well, the computer's in a very small den and the only electronic in there, other than the attached printer and scanner (both USB connected) is the wireless modem/router instaled by my internet (DSL) provider. I can try turning it off to see if that makes a difference.

Tried connecting mouse with modem off - no difference.

Have you turned off or disabled any services lately or done any tweaks to windows 7?

No to both...

Well, I don't know what to tell you. From what you posted, it sounds like its a software/windows problem. Mine worked with both the basic windows 7 driver and Logitech unifying software and yours didn't. If you haven't already i would uninstall any other wireless keyboard or mouse software just to be sure its not interfering. If that doesn't work it may be time for some basic trouble shooting, maybe run the system file checker and or do a repair install. Maybe even a clean install to start over. Doing a clean install may sound drastic but its been my experience that 9 times out of 10 it will fix problems like this when nothings else works.

Just in passing, I mention that I was unable to ever get my Logitech MX-Revolution to run properly on my Supermicro C2SBX motherboard. It doesn't use the new "unifying" USB receiver, but rather the old "dedicated" mouse-only USB receiver.

Anyway, there was apparently some type of conflicting built-in receiver or something in my motherboard. The Logitech Setpoint mouse software just could not control the mouse by itself... as if it were fighting with a second piece of hardware which had "seen" the wireless mouse and wanted to control it as well. The mouse movement would "stick", and then "break loose", etc. Simply unusable.

I never could figure out what to disable, either in the BIOS or in Windows (both XP and 7) to make this work. I finally had to just go back to a simple MS wired mouse on this machine, and move the wireless MX-Revolution to my second machine which had an ASUS P5Q3 board, and had no hardware conflict or problem whatsoever. MX-Revolution works perfectly on this machine!

So, might there be some conflicting wireless receiver built into your motherboard on this particular machine... that is perhaps not compatible with this new "unifying" USB receiver? Can you disable it in BIOS? Does it show up in Windows 7's Device Manager, so that you could "disable" it there?