Hiya,
I'm hoping you can help me also, I have the wireless (not laser) mouse 5000, and am also getting random/jerky movement with it. Really irritating when playing games.
I have a Win XP system that the mouse works perfectly on (sold this to my flatmate once I upgraded to an Alienware tower). My new system is Win 7 64 bit, and the issue only occurs on this machine (and occured the moment it was unpacked and switched on, reasonably vanilla, apart from the alienware bells and whistles, no AV software installed until I put AVG on later).
A standard USB mouse works without issues, but switching to the wireless one brings back the problem.
Running on one battery as suggested above doesn't solve the issue, and I've checked that the latest driver version is installed. There's also only one mouse listed in device manager, a USB wireless mouse.
As the folks above have indicated, the scroll wheel appears unaffected, it's just the clicking and pointing features.
Just as an aside, and it may seem like a dumb question - is this actually a wireless mouse (ie one that operates over 2.4Ghz frequencies and might be vulnerable to the same types of interference that plague WiFi) or a bluetooth device?
A second issue, related to the other piece of kit - the keyboard - Is there an on/off switch somewhere? The intellipoint software indicates that there's a button of some kind on the back, but it doesn't appear to exist on my device. I haven't used the keyboard for a while, changed the batteries (brand new ones), and now can't get it to come on - there's a red light that came on next to the battery indicator after around an hour, but the PC doesn't notice if I type anything.
Any help appreciated.