[demoninside9]

i had my turbo folder in D drive with named "tc".
when i use it i would click tc.exe.
and there is a menu named option>directories.
in directories i have change settings that why my program is not running, it shows unable to open stdio.h.
the present position in directories is
1- D:\TC
2-D:\TC
3-D:\TC
4-D:\TC

now what to do?
help me plz