To download Turbo C Software from official web site http://lmgtfy.com/?q=turbo+c+download+antique+software.In that you have to register and then you are able to download freely.

To install C software in Your Windows Operating System copy all Disk2,Disk3 files individually into Disk1 and click install.exe present in your Disk1 which came with your downloaded Zip file.
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Simply Click Here to Download