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Some months ago, I wrote regarding a problem getting Smart-Nav to work with Windows 98SE. I never could get it to work. This is another problem that has been irritating me from time to time ever since I first started using the device several years ago. Periodically, the software just crashes. There have been a variety of problems noticed in the tracking window. Sometimes, the entire window turns yellow and obviously nothing works. At other times, the cursor in the window becomes misshapen and accurate cursor movement is impossible. None of the other settings change at all. Rebooting doesn't do anything to help the problem. The only thing that works is to uninstall the software and start over again.
Since I started using the system several years ago, I've run through four computers. With the exception of the one noted above (running Windows 98SE) all have used Windows XP. Initially the problem would come up every four to six weeks. The most recent version of the software 3.20.28 is a definite improvement in this regard over the previous version. The length of time between failures is now probably every three to four months.
Any hope of fixed in this problem?

Are you plugging in directly to the system, or are you using a hub?

Have you tried isolating the device on the USB ports?

Could you attach a screen shot of your device manager, and tracking screen?

To make Print Screen work, you must save an image of what's displayed on-screen to the clipboard and then paste it into a document where it can be printed.

Windows Help: Print Screen

To do this, follow this procedure:

1. Maximize the window you'd like to capture.
2. To copy/capture the current window, hold down ALT + Print Scrn at the same time. To capture the entire screen, just press Print Scrn alone.
3. Open a new document in MS Paint, MS Word, MS Photo Editor, or Adobe PhotoShop.
4. Paste the screen shot by holding down CTRL and V at the same time.
5. Save the document as a .JPG or .JPEG file and send it in.

Have you tried turn off any kind of power save feature for your USB ports?

In the "Device Manager" you can right click the "USB Hub"(s) that show and turn off the power saving feature that turn those ports off when idle. Sometimes that has an impact on the connectivity of the devices.