After installing Internet Explorer 8 on my Vista system, I am experiencing a lot of problems. Many of them are cleaned up but there is a one problem in particular which I havent been able to resolve. So here's the problem, usually, when I receive a word document file attached in an email and when I try to open the same by double clicking on it then Windows I get a prompt to open the doc file and then Windows 2007 opens up, but as soon as the file tries to open, I get an error message saying that "This file could not be found." Similar problem happens when I try to open a PDF file, the adobe acrobat reader opens and gives an error that "There was an error opening this document. This file cannot be found." Therefore I dont think that it is a file association problem. So, can anyone tell me what kind of a problem is this?