I have an important excel file on my machine that I can no longer open. When I double click on it it says "cannot open file ".xls" it says something about me not having proper permissions and if I click OK the next box indicates the file is in either read only mode or encrypted.

The file is encrypted and is password protected. This is a stand alone PC, its not on the network. I did create the file.

I tried unencrypting the file but I get a failure error.

I really hope the file is not corrupt, it is very important

Any help would be apprecaited.