How do I reinstall 2017 after a hardware crash?

A recent computer crash has me reinstalling software, 2017 among them.  I have managed to find 2017sp1, however cannot locate sp2 or 3.  Instead I get redirected to 2018 which refuses to install. Instead I get an installer error and then installation backs out.  Seems that 2018 code is looking for a Vista oriented dll.  I am installing on a 64 bit 8.1 os.  I appreciate DS attempting to keep all as current as possible.  Unfortunately I have a couple of projects that need attention and this opps is a bit inconvenient.

 

Thanks

 

Barry