Have you ever been in a heist, everything is going fine, and suddenly the game closes without an error message? That is often a "silent crash."
Move the downloaded WSOCK32.dll file into your main Payday 2 installation directory (usually found under Steam\steamapps\common\PAYDAY 2 ).
Disclaimer: This article is for informational and troubleshooting purposes only. Modifying game files is done at your own risk. Always back up your save files and adhere to the PAYDAY 2 end-user license agreement.