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Good morning. I'm Bruce Mitchell, a/k/a "DrKlahn."
In reading the problem statement, I believe the following is the situation:
The Vodaphone USB modem previously worked, but no longer does. The problem occurred without warning, and was not associated with any hardware or software changes in the system.
If this is correct, the most likely solution for the problem is to do a Windows System Restore to an earlier date. This will return the System Registry to its previous state and undo any changes in the system software since the Restore Point was created. It will not affect any user files, and it can be undone if the problem is not remedied.
Would you like to try this approach?
System Restore Points are created automatically by the operating system, unless you have manually turned the feature off.
See the Microsoft article at the link below:
and check to see if you have an available Restore Point created before the problem occurred. I will be very surprised if you don't have a usable Restore Point.
I'm sorry to hear that the System Restore didn't solve the problem. Under the circumstances, I think it is inappropriate to ask for payment. Your deposit remains untouched, and you can either leave it for use on another question at some time in the future or ask for a refund from Billing.
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It is my pleasure. Glad to help.