This is silly, but I need to enable view file extentions option on folders frequently and I always forget it, so thought better make a note of it &-)

1. Open Folder Options by clicking the Start button , clicking Control Panel, clicking Appearance and Personalization, and then clicking Folder Options.

1. Click the View tab, and then, under Advanced settings, do one of the following:
2. To hide file extensions, select the Hide extensions for known file types check box, and then click OK.

• To display file extensions, clear the Hide extensions for known file types check box, and then click OK.