As I was told to make my comment into an answer:
I had the same problem after the Win10 anniversary update. Here too the files are found in c:\Windows.old. As already listed by others, the files are
- C:\Windows.old\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Borland.Common.Targets
- C:\Windows.old\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Borland.Cpp.Targets
- C:\Windows.old\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Borland.Delphi.Targets
- C:\Windows.old\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Borland.Group.Targets
They need to be copied to their corresponding directory in c:\Windows.
You should note however that the Windows.old directory is automatically deleted after a couple of days! For the initial Win10 this seemed to be 28 days, for the anniversary update I was told it's only 10 days! I don't know about newer versions, though.