Windows 7: no commands working on windows 7 pro 64 bit cmd

just purchased two laptop dell with windows 7 professional 64 bit, everything work perfect in the os, but when using cmd, every commands that is being used, getting "is not recognized as an internal or external command" for example in cmd you type "ping followed by the ip address" you get that its not recognised, even if type help, nothing happen, can someone help me how to make the cmd work again...thanks

Just a simple command like DIR doesn't work?

What does work?

@Kaktussoft i've tried the simple command DIR, it works ... but, ping, ipconfig,help..etc..doesn't work

c:\windows\system32\ping.exe 127.0.0.1
c:\windows\system32\ping 127.0.0.1

type exactly as shown! Doesn't work?

cd/d c:\windows\system32
ping.exe 127.0.0.1
ping 127.0.0.1

i've just used the above command that you give to me in cmd,
(cd/d c:\windows\system32
ping.exe 127.0.0.1
ping 127.0.0.1)
it work perfectly, i can ping, use ipconfig, etc.., but when i again close the cmd prompt, and open it again, it doesn't work directly, i've to change again to"cd/d c:\windows\system32" and then use the cmd,
can't i put it default on the cmd to cd/d c:\windows\system32.... please reply back

thanks for

Simply a problem with your default search path!
In command prompt
PATH
post output

SET
post output
I'm interested if this is listed:
SystemDrive=C:
SystemRoot=C:\Windows

there is C:\Users\name
that all..when i type ping (ip) it says is not recognized as an internal or external command
but when i type C:\cd/d c:\windows\system32\ ping (ip) it work well, all command that i enters..works perfect...
why?? is there something that should be done, or to change, please give me a possible solution why the cmd is behaving like that..
regards

You need to modify your PATH environment variable to at least include: %SystemRoot%\system32

To do that, right-click on My Computer, then select Properties, then Advanced system settings. On the Properties dialog select Environment Variables. In the System variables box, scroll until you find the PATH variable then select it and click on the Edit button. Add (don't replace) this to what exists there already: %SystemRoot%\system32 (if appending to the end of the existing PATH make sure you put a semicolon ; in to seperate the values).