Sorry it may be not proper to post the question here but I did get quick good answer here. . .I'm using Win2k3 32bit and log in as administrator. I checked computer->system properties->Environment variables->System variables->PATH has added the path(saying c:\abc) which I'm wanting. But when I click-opened a command prompt and type PATH, c:\abc is not there in PATH display and any commands under c:\abc not found. Only when run a command prompt as administrator, can I see it. Who can explain this to me? Doesn't System variables appended to all other user's ENV profiles? WHy I must always run cmd prompt as administrator?