Most likely, something has removed the system32 directory from your path. Have you installed the Java SDK? It has a reputation for this.
To verify this, type path at the command prompt (then type)
If c: \ windows \ system32 does not exist, you need to add it back. For this:
From the desktop, Right click 'Computer', click 'Properties' then click 'Advanced system settings' - this should bring up the System Properties - Advanced tab Click 'Enviornment Variables' Select the system variables 'PATH' Edit PATH and add this line to the front c:\windows\system32; or to be generic (in case you've installed windows on a different drive) %SystemRoot%\system32 Start a new command window to check if this has worked (or reboot) existing command windows will use the old path
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