An error occurred while reading document

Hello all,

First let me apologize for the lengthy post, but I want to be clear. :-). Ever since I upgraded my iPad 2 to the newest iOS 8 release, I have had issues with my tablet. It is running slower, as I type this out there is a delay with the press of each letter. I have to wait until each letter is typed before moving on to the next section when filling out forms for example. Openings apps has also been slower and several apps have crashed unexpectedly. While visiting websites the connection is also slower and while searching for items on Google, the search results are listed but when I try to click on one of the items, not happens. The links are not available but they are listed. I have to switch to another app or refresh the page or sometimes both in order to be able to click on one of the results.

But the most annoying issue is that I cannot open attachments up from my iOS email now. Before I was able to open the attachment and see a preview of the attachment whether it is word, excel, PowerPoint, etc. I would then open that attachment in my word processing app to edit or open the file in a pdf converter for publication, But now when I get an attachment and try to open it from iOS mail, I get a blank page with the document file name and "Microsoft Word 97-2014 document" and the size of the document. These files are files that I edited in a word processing app, CouldOn, which I then email to myself so that I may get the file into my pdf converter app. I have done this several times before the upgrade now.

I also tried to open the file in my pdf converter app even tho it was not showing in the iOS Mail preview, but then I get an error message stating "An error has occurred while reading the document".

This is really frustrating. I have googled my issues but didn't really refined any solutions, I did find some others had similar issues but they were with other previous versions of iOS, not the one I have now. Can anyone help me out here? This has basically caused my work to stop, if I cannot be sure that attachments are not going to have any issues when they are sent to clients, then I cannot send them, I need to get this fixed ASAP. Has anyone else had these issues?