Updated to Adobe Reader XI and now it wont open PDFs

I'm running Windows XP and updated from Adobe Reader 9 to XI. Firefox required the update. I have already tried to uninstall and reinstall XI, but I still get the same error. I have included the screencaps of the errors. Anyone else have any ideas of things I could try or why it might be giving me this error? I'm opening the PDFs from the file on my desktop. I have tried both double clicking the file and right clicking and hitting open.