NEW: Video Tutorials
- What is a file extension?
- Can I change a file's extension?
- Can more than one program use the same file extension?
- How do I show file extensions in Windows XP?
- How can I change what program opens a certain file in Windows?
- How do I show or hide file extensions on a Mac?
- How can I change what program opens a certain file on a Mac?
- How do I open a file with no extension on my Mac?
- Why do some file types use both three and four letter extensions?
- Can I legally register a file extension?
- How do I choose the default programs that open files in Windows 7?
- How do I change file associations in Windows 7?
- How do I show or hide file extensions in Windows 7?
- How do I batch rename file extensions in Windows?
- What are read-only files and what are they used for?
- How do I show or hide file extensions in Windows 8?
- How do I change file associations in Windows 10?
General File Related Questions
- What are temporary (.TMP) files and how do I delete them?
- How to I delete Temporary Internet Files in Windows?
- What are Windows Thumb.db files?
- What are the new document formats used in Microsoft Office 2007?
- What are RAW images and the different raw image file formats?
- Why is a WINMAIL.DAT file attached to some of my e-mail messages?
- What is the purpose of the VIDEO_TS folder on my DVD?
- How come I can open some AVI files, but not others?
- What audio file format is used for CD audio files?
- What is the difference between .BAT and .EXE files?
- What is the difference between binary and text files?
- How can I check if a file has a virus?
- What are the new Google Docs file types used by Google Drive?
- What is a Windows shortcut file?
- How do I find the original file that a Windows shortcut points to?
- What are the different OpenDocument file types?
- How can I show hidden files in Windows?
- How do I rename multiple files at once in Windows?
- Why did my Windows desktop icons change?
- How do I install an APK file on my Android device?
- Where does Android store apps on my device?
- What are the 10 most dangerous Windows file types?
- What are the best antivirus programs?
- What are the different tax file formats and programs that open them?
Mac / Windows Compatibility
Programs for Opening Files
For step-by-step tutorial videos, visit the Tutorials section.
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