You are a consumer support technician.

A customer upgrades a Microsoft Windows XP computer to Windows Vista. The customer reports that one of their productivity applications no longer works.

You verify that the application is compatible with Windows Vista.

You need to ensure that the customer can use the productivity application.

What should you do?

A.
Reinstall the application.

B.
From a command prompt, reg.exe load hku.

C.
Run the Registry Editor utility. Delete all keys that contain app.2600.

D.
Download and install the Windows Vista Upgrade Advisor.