i have this piculier problem. usually i used to ping by just typing ping 192.168.0.10 now when i do so, it displays an error message stating that: "c:\WINDWOS\system32\ping.com is not a valid Win32 application" from where has this ping.com come from???? but i can make use of it by typing ping.exe 192.168.0.10 also, if i type regedit, it states that this "regedit is not a valid Win32 appliaction" whereas if i type regedit.exe, it works. sounds mysterious????!!!! anyone out there having solution for my query?????