How to Open Excel 2007 Files As Separate Windows. If you work with multiple Excel files over the course of a workday, and especially if you use a dual-monitor setup, you might wonder how you can ...

If you cannot open an Excel file and see Excel cannot open the file because the file format or extension is not valid error, see this post.

Cannot open Word, Excel, PowerPoint files or email attachments in Office In such cases, Office may report the file as being corrupt. The exact errors may include: ...

Basically I have two users who have an issue with Different files that when they open them and make changes then try and save again it takes 20+ seconds. The files vary in size between 20k and ...