Well, I'm losing it. I loaded a new HDD after a crash: installed XP pro from a win 98SE boot(upgrade). Now my logitech cordless mouse / keyboard combi has done a wierdness. Keyboard is ok, but no mouse. Both on PS2 ports, no hardware problems. 1) removed all logitech software, rebooted, downloaded & installed new drivers from website, rebooted. No mouse, no mouse Icon in device manager. 2) booted with normal mouse and kbd, unplugged both and swapped with cordless. Worked fine. On reboot, again no mouse. 3) did a clean boot, same thing 4) called support, listened to them tell me to do the same thing then get bitchy when I told them I'd tried it already. Help ! This is a brand new KBD/mouse system, and I love it but I don't want to go back to 98SE just so it will run. I'm not familiar with XP, but it has to be a setting that I've missed somewhere.

I have one of these too and you get addicted to it easily,so where do I start.Check the batteries in the mouse,they can be deceptive sometimes...make sure it is lit up and it blinks.If it doesn't change the batteries.

wish it was that easy, batteries are fine :(

I too have a Logitech cordless keyboard and mouse system, and I kind of recall struggling to get every thing to work right. I note that you had a hard drive fail, I have a sneaking suppicion that you may need to replace the batteries in the keyboard and the mouse. This is off track and you may not like it, but at our office we had some problems with some error messages when this one computer was trying to boot, we called Dell tech support, they said it was a hard drive going bad. We had the hard drive replaced. Shortly after that mess, an identical computer started having the same errors, and I traced it back to dead batteries in the keyboard. All that asside, and presuming you have good batteries, when you say that the mouse is not working, do you mean that the pointer is not showing up on the screen or do you mean that the pointer is on the screen but is not moved by the mouse? If the pointer is not on the screen at all, then the computer can't see the mouse on the PS2 port. If you have the same type of keyboard and mouse that I have, there is a USB / PS2 addapter on the mouse part of the cable. I would try the USB, but remeber that the computer should be powered off before messing with the PS2 port. You can plug the USB in with the computer running, and I would wait untill the computer has completed booting. If the problem is that the mouse just won't move the pointer, a driver problem, make sure that you are logged in as the administrator, not just administrator privleges. It is difficult to work without the mouse, but try to use the Logitech setup disk to only run the mouse install program. I think what I ended up doing, was leaving the mouse unpluged while booting, then putting the Logitech driver cd in the drive. Cancel the set up program when it started. Then plug USB conector into a USB port. The computer spotted the mouse, and I sent it to the Logitech cd for drivers. let me know if any of this helps or not. Derek Opps, he beat me to the post about the batteries.

If your reciever is hardwired to both usb and PS2 connector,disconnect only the wireless mouse(leave the kbd plugged in)connect a regular mouse,then go into safemode remove everything under the keyboard and mouse category,remove usb root hub and remove usb composite device as well as any other duplicated devices in the dev mgr.Restart let windows detected and install the devices,make sure the keyboard works,then disconnect the wired mouse and connect(use the actuate button at the buttom of the mouse)your wireless mouse, That ought to do it.Goodluck

Although the Kbd does have a usb, I'm using a PS2 adaptor as recommended by logitech; so both Kbd and mouse are PS2, not USB. Derek, it seems opposite to yours (i.e., Mouse is PS2 & Kbd is USB w/ adapter). The pointer IS on the screen, light comes on in the mouse & looks like it's communicating ok, just dosen't move the pointer. If I connect with USB instead of PS2, I have nothing at all for either KBD or mouse..

well, tech here in Germany helped me out, I have it running on USB after editing my registry, but it still won't work on the PS2 ports. Thanks for the suggestions folks :)