Hello,
Please try this:
Open up the "My Documents" folder.
Go to Tools / Folder Options / File Types (wait until it the content appears)
Press the X key to jump to the extensions beginning with X.
XLS should say Microsoft Excel Worksheet. Underneath it should say "Opens with Microsoft Office Excel". If not, click on Change and select Microsoft Office Excel from the list.
Similarly, DOC should refer to Microsoft Office Word.
I hope this helps. If so, please click on the Accept button. Feedback is greatly appreciated. If you need more information, please click on Reply.
Thank you,