If you have a 2nd hard drive, then disable the Page File on your C: drive and enable it on your 2nd drive and set that one to Custom Size.

If you’re noticing slow performance in Windows 10, try changing the Initial Size and Maximum Size to the Recommended File Size for both. By default, in all versions of Windows, it is set to allow the system to manage it. While searching around for some tweaks, I came across a thread on the Microsoft Community forums and one suggestion was to change the settings for the Paging File to fix Windows 10 slow performance. The fixes below have had good reports of fixing Windows 10 slow performance.

If you’ve been running the Windows 10 on your computer, even with the newest hardware, you might notice that the operating system seems to slow down or lag at times where menus open slowly or sporadic mouse and keyboard movement.