I am using Adobe Reader XI with Internet Explorer 10 on Windows 7. Lately, just about every Adobe file I have tried to open or view has resulted in an error message coming from the reader software stating that there is a problem with the Adobe file. I've already done a repair on install, but that has not resolved the problem. It would seem that maybe some combination of the system setup is causing the problem. I am frequently accessing PDF files, so I need to have a reliable software application.