''Steam cannot find graphics card''

[ChappersTeddy]

I had the sudden urge to play Terraria a second ago so I started it, and it said:
Terraria cannot find graphics card.
I then tried Portal 2.
Portal 2 cannot find graphics card.
My graphics card is working fine for Blockland and other things, any help?

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[ChappersTeddy]

Oh; its nothing, just a small error. Locking now. nothing to get worried about.