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New Version of a Program detects Old version even after complete uninstall.

I am attempting to install a new version of some software (for a 3G data card) on windows XP. I have uninstalled cleanly using "add/remove programs" and also deleted any trace of the the software from the Registry and Hard Drive. However, when I try to put the new version on , I get "Error 1714. The older version of <<application name>> cannot be removed.  Contact your technical support group.".

It's becoming very frustrating. Have tried same procedure on two other laptops and it worked fine.

Any suggestions much appreciated.

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2 Solutions
Did you also uninstall the driver when you removed the software? Have you turned "System Restore" off?

To uninstall a driver, right click "My Computer", select "Properties", then the "Hardware" tab, and "Device Manager". Right click the 3g card which you want to uninstall, and then select "uninstall". Remove the card after having shutdown the system.

To disable System Restore, right click "My Computer", select "Properties", then the "System Restore" tab and turn system restore off for the drives which get monitored.
dannewtonAuthor Commented:
Guys -
tried both these suggestions, but problem persisted. When I tried re-installing software - there was a brief reference to a registry entry that I managed to check via screen-grabber before the message disappeared. The registry entry had nothing to do with either Modems or Datacards, so I'd never have guessed to look for it. Deleting that entry allowed Install Wizard to run properly :-)  

However I'm now getting Error 797 when I try and use teh card as a modem. :-(  2 steps forward, one back.....

Anyway - I'll split the points for at least giving me some constructive suggestions.

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