It also brings you up to the latest version, and installs most all Updates.. Do you know what version you're on now? That right there might be what's needed.
I gave you a Tom's hardware tutorial which will show you what to do for the Repair Install. Follow that now.
After install expedite all Windows Updates including Optional until no more are offered. Then import any drivers from the PC maker's Support Downloads web page for your model that are newer, or branded instead of generic. The most basic thing we need to learn to maintain a PC is how to keep the latest manufacturer's drivers current. Windows drivers are rarely enough.
Any questions on Repair Install, or what to do after install?