Path variable reset problem in XP

Question

after restarting my machine The path variable has been reset. In what scenarios the path variable is reset?

Answer 1

It depends on how you set it.

If you run set PATH=... in Command Prompt, the environment variable is modified only for the cmd.exe process (and for all programs you run from the same Command Prompt window). Other processes are not affected.

To make your changes permanent, go to System Properties → Advanced → Environment Variables and under User variables click New.