1. Close the Help and Support window.
2. Start the Registry Editor by clicking Start, typing "regedit" (no
quotation marks), and pressing ENTER. (You need administrator
privileges to do this.)
3. Navigate to HKEY_CLASSES_ROOT\.png.
4. Right-click the .png folder, point to New, and then click String
value.
5. Add a new string named "Content Type" (without quotation marks).
6. Double-click the new Content Type string and set the Value data to
"image/png" (without quotation marks).
7. Close the Registry Editor, and then open Help and Support.