K90 Not Recognized Windows 7 64-bit, Works on Windows XP

Just purchased a K90 to use with gaming, but ran into a small snag.

 

I plugged my K90 into my Windows 7 (64-bit) PC, and it was recognized. However, I tried to run the firmware update, and there were issues, so I tried to unplug/replug the device (perhaps my first mistake?). I changed ports while at it, and mistakenly plugged the K90 into a USB3.0 port the second time. Since then, the K90 is not recognized on my system, no matter what I try. Everytime it is plugged in, the device driver fails to install.

 

However, I took it to a Windows XP machine, and it was immediately recognized, and I then ran the firmware update. Works fine on that computer, but still refuses to work on my 7 machine.

 

Any suggestions? I have scanned through the forums (and also done a few Google searches), and tried things that looked similar, but to no avail.

When you plug the K90 in to the Windows 7 computer, Does the L.E.Ds light up?

Does Device Manager show an Unknown Device?

 

See if you can system restore to a point before the K90 was installed.

When I plug the K90 into the Windows 7 computer, the LEDs do not light up. However, the Device Manager does show an Unknown Device.

 

I attempted a System restore, but the K90 responds the same way after the restore as it did before.

Can you try manually installing the drivers by right clicking the unknown device and select the x64 drivers folder in the software folder.

Actually, after rebooting a second time after the System Restore (I was prompted to by Windows, update or something), I plugged the K90 in, and it just took off, no problems. I have no idea what changed. I'll keep an eye on things, but it seems at this point that everything is working (I'm typing on it right now). Software is working, LEDs are on, volume roller works fine. Thanks for the suggestion(s) Toasted, looks like that took care of things!

As a note, the manually installing drivers refused to work prior to the System Restore, it claimed the device "already had the newest drivers installed", albeit for an unknown device. After the 2nd reboot (after the restore), I didn't have to do anything manually at all.