Open Start Menu (Windows Icon) and click on Settings > Update & Security settings > Windows Update.
Here, press on the Check for updates button.
If any updates are available, they will be offered to you.
If Windows Update says that your PC is up to date, it means that you have all the updates that are currently available for your system.
For faster performance:
Perform Windows 10 clean-up click "Start" then go to All Programs > Accessories > System Tools > Disk Cleanup
Defragment clean-up go to "MyComputer" >right-click on the hard drive > select "Properties" >under the "Tools" tab there should be an option to "Defragment Now"