The above message shows in EVERY file I try to open one of my files. I don't know how to "create an association in the Folder Options under Control Panel" because I don't know which tab to click on after clicking on Folder Options.The problem seems to have arisen soon after I performed a DIY Norton PC Power Boost for Windows XP. but the only program I had (mistakenly) deleted to save space was Dell Network Assistant.I was using Word 2010 on a Trial basis when this problem arose. The trial ends January 31.I can't create new files or work on files I just recently created. Help!Do you think I have a virus? My email works just fine.1 person needs an answerI do too