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serializationStream error message

I am using a Toshiba Satellite with Windows XP Media Center Edition SP2 and an HP Printer-Scanner-Copier model 1315v. Everything was fine until a week ago. Then when I tried to open the HP Director or HP Image Zone or HP Document Viewer I get the error message: "The program has encountered an unexpected error: Parameter cannot be null. Parameter name: serializationStream" At that point the HP application shuts down, although I can still print documents and copy, but I can't scan. I have talked with the HP support folks three times, uninstalled and reinstalled the HP software, and the problems persists. Recently the same error message appeared before I even tried to use the HP device. So I think that the problem is with the Windows software rather than the HP software. I have my Toshiba Recovery and Applications/Drivers DVD. What can I do to fix this problem?

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and235100

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JPaulC

ASKER

Well, your suggestion above seemed very promising. So I carried out all the steps, many of them more than once. The program was thoroughly uninstalled, reinstalled, and still the problem persisted. I located the driver for the Satellite on the Toshiba website and downloaded it. It just finished the driver installation, and it STILL won't work. Any suggestions?

JPaulC

ASKER

Well, I finally spoke with Toshiba's support service(?) and have been convinced that because of this and other problems (please refer to my other two questions), I should simply reformat the hard disc, reinstall my programs, and reload my data. I am in the process of backing up again my data as much as possible. I want to thank each of the contributors above. You folks have put a lot of effort into helping me, and I appreciate it greatly.
JPC