If your Firefox profile gets corrupted and you have to create a new profile or your computer crashes and you have to reinstall Firefox, the extensions that you enabled in your previous Firefox ...

One of our readers reported that all the file extensions have changed to some unknown file format. If so, it could be a virus! If a virus has changed all the files extensions to unknown applications, ...

If you've overwritten a Word file and haven't saved any older copies of the file under different file names, you can check to see whether Windows 7 has a previous version of the file to restore to.