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I came back to my computer, and the following message had appeared:

enter image description here

I'm wondering what reasons could there be for this? Is there a log I can check to see what was actually installed?

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You could try looking in Device Manager (Control Panel, or right-click on "Computer" and hit "Manage"). – GalacticCowboy Feb 19 '13 at 22:46
Event Viewer might show something useful. – Karan Feb 20 '13 at 0:28

open Device Manager, look at the properties of the device and look for the Hardware IDs. Now go to a PCI database and search which device this is.

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