delete a system variable

[xbl01234]

Hello;
My operation system is Window XP.

I got a problem to delete a System Variable from Enviroment Variables section.

when i click the delete button from System variable section, it does not has reaction. I could delete my user variable, but i could not delete it from System Variables.

Could anyone help me, please.

[kaled]

What variable are you trying to delete?

Generally, there is no reason to delete environment variables, although you may need to edit them.

Kaled.