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When I move my windows around they are really laggy. I had a feeling it's because Ubuntu isn't taking full advantage of my graphics card so i went to install the additional drivers. The normal proprietery one does nothing to help the window issue and everytime i try and install the post release update it says "Sorry Installation of this driver failed"

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Welcome to Ask Ubuntu! We need more hardware information to help you, can you look at this question and then edit your question adding the information. – Jjed Jan 30 '12 at 20:49

I can't comment on the failed post-release update in the restricted drivers tool, but I have experienced the laggy windows and I read that you can un-tick "Sync to VBlank" in the OpenGL module in the General section of ccsm (if you don't have ccsm, sudo apt-get install compizconfig-settings-manager, then just run "ccsm"). I also read this affects mostly ATI cards.

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If you have an ATI Graphics card, you can't install the post-release-update one because the fglrx-updates ubuntu package is broken (bug:

I also got that problem. So I went ahead and installed the normal one. It does not fix the laggy windows on my computer, and it also caused my computer to become unstable. (Reported Bug:

So I'll just wait until the fglrx-updates package is fixed. You'll able to install the post-release-update Driver.

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