Your Operating System (OS) massively influences the performance of your system. You can have a supercomputer, but if you installed inappropriate drivers, the performance would be very poor. Windows 10 has a bunch of software preinstalled that can harm your performance. Many settings are not optimized for performance and some features can cause stutter while playing games like PUBG.
So let´s try to squeeze Windows to give you maximum performance.
DISCLAIMER: Always make a backup of your OS (Restore Point) before changing anything. With millions of different hardware components, there is always a little risk that a change can cause a system crash on your hardware.
Here are some very good guides:
General optimization of Windows 10 for gaming:
Configure your Firewall:
Tweaks for PUBG: