This forum has migrated to Microsoft Q&A. Visit Microsoft Q&A to post new questions.
Hi,
Please check whether this computer could connect other Windows 7 system.
Also test using other Windows 7 computers.
In addition, Check the following thread whether it could help:
Windows 7 cannot connect with Telnet
http://social.technet.microsoft.com/Forums/windows/en-US/e2969904-a7fe-4439-a0d7-35fe237a3490/windows-7-cannot-connect-with-telnet
Regards,
Vincent Wang TechNet Community Support