Photoshop won't save changes

[coachgns]

Suddenly, when I try to close a PS7 file, I am getting a message:

"Could not save C;___________ because the file is locked. Use the 'Properties' command in the WIndows Exploer to unlock the file."

When I try to open Windows Explorer, it opens my My Documents folder. I do not see a 'Properties' command.

What the heck is this all about? PS was just fime until about an hour ago.

Thanks for any info on this!!!!

[Sebastian]

Right-click on the file to find the "properties" choice. Make sure it's not read-only.

[coachgns]

Thanks.
Don't know how that file got to be Read Only, but that fixed it.