Windows preventing running of Telnet client

Question

At first, I had issues because Windows 7 doesn't install the Telnet client by default (also, SuperUser has a thread).  So, after installing it (and restarting, like Windows asked, though completely unnecessary), I opened a command prompt, and went to run my new Telnet program.

I enter telnet, and receive:

C:Users[USER]>telnet
'telnet' is not recognized as an internal or external command,
operable program or batch file.

"That's odd," I think to myself.  So, in Windows explorer, I navigate to WindowsSystem32 and see telnet.exe sitting in that folder.  If I double-click on the executable file, the Telnet command prompt opens for me without a problem.  So, I return to my Windows Command Prompt, and enter:

C:Users[USER]>WindowsSystem32telnet.exe
'WindowsSystem32telnet.exe' is not recognized as an internal or external command,
operable program or batch file.

And then (grep comes from cygwin):

C:UsersryanDesktop>dir WindowsSystem32 | grep telnet

Nothing.

I've disabled UAC and have no idea why my Command Prompt is lying to me.  Anyone experience something similar?

Also, I've found that I can create a Windows shortcut to telnet, which will point to the right file and successfully open the Telnet prompt.

To recap: In Windows 7, I have installed Telnet and can see it in my System32 folder, but cannot run it via a Command Prompt.

palswim · Accepted Answer

I no longer have this problem. Whether Microsoft fixed something or I did something, I don't know. If I encounter it again, I will re-open this question.

Wasif Hasan · Answer

go to registry key HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionImage File Execution Options, then create a new key named telnet.exe, then create a string value named Debugger and set value to Block.

barlop · Answer

At the moment you think you put it in c:windowssystem32

and you are having trouble running it from the command prompt.

forget the path  environment variable for now. You have a weirder problem that you can't seem to even run it directly.

A good thing to do then, is Go to windowssystem32
    C:>CD WindowsSystem32
    C:WindowsSystem32>telnet 
any luck? probably not
    Make a directory C:blah

Open windows explorer. Copy telnet.exe  to that directory

Open a command prompt

C:>CD Blah
C:Blah>Dir

See if it lists telnet there

Try  dir /a  Does it list it now?

Try c:blah>attrib

That should list files a bit like dir, but showing attributes.

If you manage to put it somewhere where you can see it in the command prompt, then copy it to a few toy directories, and eventually into c:windowssystem32   and wipe your brow.. and try to figure out what's going on or what happened!

I don't have windows 7, but See if this happens for any other EXE files.. or is it just telnet.exe  maybe windows 7 is playing games with that one exe file. If it is you should be able to find out! If you copy files into the directory, do you find the command prompt shows the others but not telnet.exe? make it a directory of your creation without much in it, so you can see what you're doing.

Windows preventing running of Telnet client

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