Linked below is a patch that should allow for all of these features listed below for the optimal vanilla experience on your modern machine.

https://drive.google.com/open?id=1p_OWTpHoe32X-QBOYEPri_RlzmbQSqaL

• Patched versions of WinQuake, QWCL, GLQuake, and GLQWCL (taken from GOG's Quake: The Offering) that are made compatible with .ogg music playback (comes with necessary files for operation)
  
• Original QWSV dedicated server executable (also taken from GOG's Quake: The Offering)
  
• Vanilla-compatible version of spawn.mdl for QuakeWorld; this means that you can connect to KTX-based servers without crashing.
  
• The .ogg soundtrack for Quake, and both Mission Packs 1 and 2
  
• Autoexecs that will enable mouselook and a crosshair and disable autoaim out of the box
  
• Additional .cfg files (music.cfg in hipnotic and rogue) for remapping the music for the mission packs (must be run +exec music.cfg from the parameters)
  
• Extra configuration files to enable non-square pixel resolutions for modern displays (320x200, 640x400, etc.), which were common at the time of WinQuake/GLQuake's release.
  
• A copy of Simple Quake Launcher 2 for easy parameterized launch

Quakespasm Users
If you often use the 64-bit version of Quakespasm or Quakespasm Spiked, this patch will cause memory errors on launch. However, this can be remedied by installing the 32bit version of Quakespasm/Spiked.

Autoexecs
THIS WILL erase any previous autoexecs you have in your id, hipnotic and rogue directories, so back them up before extracting.

Simply extract the Quake folder from the patch to the directory with your Quake installation folder. You'll need an archive program to extract it, so go download WinRAR or something.