If you're having issues with your computer running slow, or you're getting frequent errors, it could be an issue isolated to your user account. This is especially true if you're noticing that it's taking a long time to simply log in. Creating a new, fresh user could resolve those problems and improve performance. Windows 10, however, makes it more difficult to do this with its new Control Panel. Here's what you'll need to do to create a new user on Windows 10:
Press the Windows Key + R to launch the Run dialog box. In that box, type "Control UserPasswords2" and hit enter. This brings up the older Control Panel, and you'll see the option to create a new user.
Creating a new user is a good thing to try before wiping the drive and reinstalling the operating system. If that helps speed everything up, then you can keep using the new account and get rid of the other one once it's all set up.