Question: I'm having a problem finding which compiler can support Windows7 for C or C++ programming.
I had installed Turbo but it does not work in full screen on Windows 7.
Please let me know which compiler will be appropriate.

Answer: 
C-Free is also a Nice one u can go for it
use Gcc with CodeBlocks, this is the best solution for C programming in Windows 7/8/Vista

Get it from here.
<http://www.codeblocks.org/downloads/26>

But if you want to run Turbo C, you can do it via Dos Emulator DOS-Box
(as answered by Chaitanya)

However I will strongly recommend to use Code Blocks

You may need to switch Turbo C with DOS-Box, if you have to use graphics.h Libraries
(which I found easier, compared to CodeBlocks)