Unable to run chkdsk, defrag, etc

[Guest]

When trying to run certain files it refuses saying that the system could not
find the enviorment option. c:/windows/system32/dfi***.exe Do you have
any opinion as to if the file is missing or corrupt or suppost to be named
something else?

 

[Victek]

When trying to run certain files it refuses saying that the system could
not
find the enviorment option. c:/windows/system32/dfi***.exe Do you have
any opinion as to if the file is missing or corrupt or suppost to be named
something else?

"control panel/system/advanced system settings/advanced tab/environment
variables". Check the path strings.