Forum Discussion
My important file corrupted and I need help
When I tried to open it, it said that "The file format and extension of 'filename.xls' don't match. The file could be corrupted or unsafe. Unless you trust its source, don't open it. Do you want to o...
If you rename it as .txt and open in Notepad there is no information within file. Unfortunately it looks like information is lost. Perhaps you may find another copy of it.