I went into the safe mode but couldn't connect to the Internet from there. Nothing was coming up under Show Available Networks. The troubleshooter function doesn't work in the safe mode so I couldn't try that.
However, I think may have found the source of the problem. I noticed that I was able to attach some Word docs and not others. At first I thought it had to do with the date of the file, but I now see it has to do which folder on my internal drive the documents are in. In some folders, I can attach all or most of the Word documents and others I can't attach any. This has nothing to do with the date of the Word doc. So perhaps retrieving from the folders is the cause of the problem?
I tried moving a Word doc I couldn't attach into a folder where I could attach Word docs, but that didn't help for the doc I couldn't attach and it didn't negatively effect the other Word docs.
The problem with Excel docs seem to be the same as with the Word doc. I have no problem attaching PDF or pictures from any folder on my computer