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I have diagonal lines running across every web page that I open. It will partially change to white if I scroll up and down. Also, notice that when my cursor is in the search bar, it doesn't show the full cursor but flickers (in this picture, only half the cursor appears).

screen shot of the display problem

Also, Firefox is kind of messed up too. Words don't appear in Firefox search bar when I type them in, but the words are in there (since it performs the search just fine). The problem is fixed when running Firefox in safety mode.

I already tried disabling add-ons, uninstall & reinstall. I am running 64-bit Windows 7.

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migrated from webapps.stackexchange.com Jul 25 '13 at 21:15

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Have you ruled out the obvious and ran a malware scan? Maybe boot a linux livecd, and see if you get the same behavior from a browser from a read-only cd? –  Zoredache Jul 25 '13 at 22:33
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