In order to install Turbo C (Which can be found here )in windows 7 you first need to download and install dosbox here.
Step 1: Create a folder in c:\ drive and name it turbo (or anything convenient for you)
Step 2: Now extract TC installer in this newly created folder
Step 3: Run dosbox from start menu.This will load dosbox emulator.
The prompt will display Z:\>
Step 4: Now you need to mount the folder that you created in the previous step.
in the prompt type:
Z:\>mount c c:\turbo
You will get a message that drive c is mounted as local directory c:\turbo.
Step 5: Now just by few commands you can open your turbo c
Just type:
Z:\> c:
c:\> cd tc/bin
c:\tc/bin:> tc
Step 4: Turbo c will start .Go to Options > Directories.
Change all the drives to c if not already there.
Example: In include Directories
H:\ TC\ INCLUDE
Simply replace 'H' with 'c'
Similarly for other options below it.
Configure DosBox to automatically load c++ in full screen
Step 1: Load the DosBox configuration file from the explorer, path for configuration file may be C:\Program Files\DOSBox-0.74\DOSBox 0.74 Options.bat or load it from start menu "AllPrograms->DosBox- 0.74->Options->DOSBox 0.74 Options".
Step 2: The file opens with default text editor. You need to make following changes in the text file.
fullscreen = true
fulldouble = true
fullresolution = original
windowresolution = original
Step 3: Scroll down and look for [autoexec]. Below that type following commands.
mount c c:\turbo
Z:\>c:
c:\>cd tc\bin
c:\tc\bin\>tc
Now whenever you load dosBox you it will automatically load turbo c.