Command Prompt does not recognise ping, ipconfig and other commands

I am running Windows XP Home edition. Lately, I am facing a peculiar problem. Whenever I launch the MS DOS command prompt and execute commands like PING or IPCONFIG, I get an error message saying 'ping' is not recognized as an internal or external command, operable program or batch file. However, when I run the same PING or IPCONFIG command from the open dialog box of the Run option on the start menu, the command executes properly. Any clues??
gurutekAsked:
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SheharyaarSaahilConnect With a Mentor Commented:
Hello gurutek =)

Check this PAQ,

Ping is not recognized as an internal or external command
http://www.experts-exchange.com/Networking/Microsoft_Network/Q_20916776.html
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sunray_2003Commented:
Check this

How To Manage Environment Variables in Windows XP
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q310519'

These variables may not be correct
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sunray_2003Commented:
Try this
right-click my computer
go to properties
go to advanced
click on "environmental variables"
under system variables , click on path to enable it
click on edit
and add this
%systemroot%\system32

log off, log back on and check
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IanThCommented:
i concur its definately the path is wrong but when you do go to edit it make sure that the paths are correct as it seems a bit funny that the path variables have changed maybe due to malicious code!
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