Can't Save a File

One possibility:

I'd check your permissions to the directory. You may not be able to create new files.

1. Right click on the directory in Windows Explorer and click "Properties".

2. Check under the "Security" tab and make sure that you either have all of the regular permissions (Modify, Read&Execute, List, Read, Write) checked, or if you have "Special Permissions" checked click on the "Advanced" button and make sure your username shows up in the list with "Full Control".

If you don't have permissions to Write, at least, you won't be able to save new files.

Have you tried uninstalling and then reinstalling Excel? Do you defrag, check for spyware, and run a utities program like Norton or Defender Pro to check and clean redundant files from the the drives and registry on a regular basis? These are some of the things that I would try.
-Olen

What exactly are you trying to name your files? Are you using any forbidden characters, such as the forward slash "/"?

If so, try giving the file a simple name using only alphanumeric characters to ensure that this is not the problem.

Have you checked for MS Office updates? A friend of mine had similar problems. It only affected Office programs (Excel, Word, etc.). After installing the latest Office updates it went away.

I've had this happen once. The next day my computer wouldn't boot. The hard drive had to be replaced.