Unable to update PATH Environmental variable

Question

When I attempt to update the PATH in Advanced System Properties and click OK, the   %WINDIR% variable is no longer available. I am then unable to access any command that uses the %WINDIR%\System32 variable to locate an executable. For an unknown reason there also is a PATH variable under User variables with just C:\PHP in it. When I attempt to delete this, the same behavior occurs. I have to use system restore to get it back but then I lose my PATH changes.

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Mike

Answer 1

Mike

Have you tried reinstalling PHP?

You can change any registry keys, but I suggest you:

1. Use the snipping tool and make a picture of the subkeys of Environment.
2. Create a system restore point.
3. Change the registry keys and restart the computer.
4. Take the picture again and compare the two.

Answer 2

Any idea why changing the PATH variable  removes the %WINDIR% variable value?

Can I fix the %WINDIR% variable in the Registry also?

How do I fix my system to allow me to use the Advanced System Properties rather than the Registry?

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Mike

Answer 3

The Environment Variables should match those shown in registry key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment. If necessary, change the path registry key in the right pane. Create a system restore point if you’re apprehensive about making registry changes.

A full list of the variables can be displayed by opening a Run window (Windows key+R), type cmd /k set (note the two spaces) and press Enter.

Also, you may wish to run your 'anti' programs, just in case you're infected.