Is there a way to install OpenSSL without installing man pages?

Unfortunately Perl somehow runs into errors when attempting to install man pages for OpenSSL (for example OpenSSL_1_0_1g). Because I don't need them - I want to use OpenSSL as C library only, I guess I could bypass this issue by skipping the installation of man pages altogether.

Is OpenSSL included in Windows?

OpenSSL for Windows has now been installed and can be found as OpenSSL.exe in C:\OpenSSL-Win32\bin\. Always open the program as Administrator.

Yes:

make install_sw

But, just to note, you should not be installing 1.0.1g at all. That is a very old, insecure and out of date version. Perhaps you meant 1.1.0g? There shouldn't be any perl errors during installation of an up to date OpenSSL. If you get them you can file a bug report here: https://github.com/openssl/openssl/issues