单项选择题

A.AB.BC.CD.DYou have a computer that runs Windows Vista……

You have a computer that runs Windows Vista.
You upgrade the network adapter driver on the computer.
After the upgrade, you can no longer access network resources. You open Device Manager and see a warning symbol next to the network adapter.
You need to restore access to network resources.
What should you do?（）

A.A
B.B
C.C
D.D

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