Ya you can run turbo C in windows 7, but you have to download a software called as DOS box
step 1:copy all your turboc files in one folder in c drive.i mean copy all the files in the bgi,include folders,and all other folders into a new folder.you should have all those files under a single folder.
step 2: run the software dosbox
step 3: At the prompt,type "intro mount"
step 4: type mount c c:\tc ( "tc" is the nameof folder you copied files of turbo c)
step 5: type "c:"
step 6: type "dir' in front of c:\ and type "tc"
Now you can open the DOSBOX and you can use the turbo C
Hope that helps