Hi Edy
Your PC was introduced for sale in January 2011.
There is not much you can do to the hardware to make the PC run faster. Maybe your HDD is failing or clogged with junk files. Cleaning junk files or upgrading to an SSD is a big performance booster.
Maximum memory allowed is 16 GB. You have 14 GB. The Intel 1155 chipset, while good when released, is now showing it's age.
This PC shipped from the factory using Windows 7. How did this PC run when using Windows 7?
Going back to Windows 7 is a pain, but an option. Your PC was optimized for Windows 7. Or try reinstalling Windows 10 clean. Back up data and have product keys handy for programs you have purchased before doing a clean operating system install.
A clean operating system install will revitalize an erratic or misbehaving PC.
Grzy