Excel Won't Save New File...

This started a couple of weeks ago, and since it's my work computer, I have no idea if something got pushed onto my computer that messed up excel, but this is really irritating.

Basically, the main part of my job is that I get excel files from clients, then I have to take specific info from that file and work with it. So I copy/paste it into a new excel file. Recently, I started getting this error message when I tried to save the new file:
"Y:\GEO\Test.xls cannot be accessed. The file may be read-only, or you may be trying to access a read-only location. Or, the server the document is stored on may not be responding."

None of those things are true, as I can save any other kind of file in this location, and I can actually save the original excel file(from the client) in this location. As a matter of fact, the only work around I've found is to actually save OVER the original document with just the data I need. But I can't change the name when I save. I have to do that later, in the file list. It's a very tedious way to work, so I was hoping someone might have an idea what's causing this or how to fix it?!

JBeaucaire...nope. I can't even just open a new document, enter data, and save. Only way I can save is saving over an existing doc-which you can imagine isn't really an option in most cases.

So....a new twist: I CAN save a new file if I put a space in the filename. This makes no sense to me, and had our IT guy stumped too!

Well, like I said, I can't even create a new file, unless I give it a name with a space! It's the oddest thing I've ever encountered! And a read-only file won't save if I change a character or add a character...only if I add a space!

Originally Posted by JBeaucaire

Well that is truly odd!

I've just had the same problem and came accross your dialogue whilst searching for an answer.
What I HAVE found is that it's not WHAT I'm trying to save but WHERE I'm trying to save it to.
A couple of days ago I had my laptop repaired and, in order to save all my data, the repairers put all my files into a folder on the desktop. I didn't like it there so I moved it to where I used to keep it and that seems to be why I can no longer save files. Then I tried saving them to a folder on the desk top. No problem.
The odd thing is, as you say, that existing files are unaffected.