IE7 cannot associate with telnet program.
Tuesday, December 12th, 2006If you happen to use IE7 and found out that you can no longer use the telnet program associated with IE7, put this key on your registry.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_DISABLE_TELNET_PROTOCOL
Name: iexplore.exe
Type: REG_DWORD
Data: 0