Either the Path statement in your system is no longer pointing to the folder where these files are stored, those files aren't where they're supposed to be, or something's messed up in Windows when trying to access them.
To check you Path statement, go to Start...Run...and type in "sysdm.cpl" (without the quotes) and press Enter.
Click on the Advanced tab, then on the Environment Variables button.
Double click on the PATH variable (NOT the ClassPath) and read what's there. It should include the System32 sub-directory.
If that's OK, then search your system for ping.exe and ipconfig.exe Use the advanced options to search hidden and system locations.
Beyond that we'd have to start checking for malware and the integrity of the system files.
This post has been edited by usasma: 11 November 2008 - 07:59 AM