If you install patch 2 and then the DRM free executable, there will not be any activation or internet connection required.
BTW, in another topic (
New patch) someone gave the direct download links to the patch files as
setup.exe and
setup-1.bin (though if there was a problem with the link you gave it probably wouldn't have been downloaded over three thousand times). I used the program
Hash to calculate some checksum values for the files I downloaded directly (though I have to wait until I build a new computer to play the PC version of DKS, so have not installed the patch).
Welcome to the forum.

File: setup.exe
Size: 611056 bytes
MD5: DA7E9EFC18842755EB2B4B1C2B0955A8
SHA1: 3791A41524B07125EFAD0B7ED70ADA4E2ADB6AEA
CRC32: 53252015
File: setup-1.bin
Size: 167499504 bytes
MD5: B483358BB88DEE3B8303222BC908F84D
SHA1: F09A3B78BC3F0982E2DCEF34549CE26ED4BB2F2A
CRC32: CE334FFA