restore mac book pro 17" back 5 days.

mac book pro 17".   OS Yosemite.

How do I get time machine to restore my computer  back 5 days only.  I got a virus and scanned with virus protection already.  Computer will start but no video, on screen or external screen.  After it is off a while, I start it up and I get the video.  I am thinking something changed when I open the one file.  If I restart now I might not get video.

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This Apple KB will tell you how to do it:

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I doubt if the problem is a virus though. Try running the Hardware Test:
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Mac OS X

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