Date:2013-06-30
Safety:Kaspersky McAfee Noton BitDefender AVG

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ChallengeResponse.dll

·Go to the download page

Using the zip or rar file
1.Download ChallengeResponse.dll
2.Extract ChallengeResponse.dll from .zip. We recommend that you extract ChallengeResponse.dll to the installation directory of the program that is requesting ChallengeResponse.dll.
3.If that doesn't work, you will have to extract ChallengeResponse.dll to your system directory. By default, this is:
C:\Windows\System32 (Windows XP, Vista, 7, 8)
C:\WINNT\System32 (Windows NT/2000)
C:\Windows\System (Windows 95/98/Me)
4.If you use a 64-bit version of Windows, you should also place ChallengeResponse.dll in C:\Windows\SysWOW64\
5.Make sure overwrite any existing files (but make a backup copy of the original file).
6.Reboot your computer.
7.If the problem still occurs, try the following:
8.Open Windows Start menu and select "Run...".
9.Type CMD and press Enter (or if you use Windows ME, type COMMAND)).
10.Type regsvr32 ChallengeResponse.dll and press Enter.