• This is usually fixed by emptying the Temporary Internet Files.

Go to Control Panel> Internet Options.

Select the General tab.

Click Delete files.  When the next dialog pops up place a check in "delete offline content"

OK your way out.

• If you have a shortcut to Notepad on your desktop rename it to Npad.
• Some people have reported that Quick View Plus can also cause this problem.  The solution is to uninstall Quick View Plus.