All of a sudden, reader xi wont launch, read pdfs, or download pdfs online. When I double click the program shortcut (or pdf I want to open) the mouse makes the "loading" animation....but nothing happens. No error message, just refuses to work. Re-installing temporarily fixed the problem. However, the next time i turn on my machine the problem returns! I'm at the point where I have to reinstall adobe everytime I turn on the computer 
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Any advice would be welcome.
I'm on windows 7 btw