You can easily update your windows 10 to the latest version, here you can check details:
Step 1: Go to link and downlod tools first https://www.microsoft.com/en-us/software-download/windows10
Download and save the tool:
Step 2: find the software you’ve just download, double click it and it will auto detects if the computer environment is normal. After the test is completed, it will start downloading the latest win10 system update.
It may take about 15 minutes for the downloading, once you see below picture it means the update downloading finished, click restart now to update the pc.
Step 5: Let’s check if the system updated to the lastest version or not:
Press “Win” + “R” on keyboard, input “winver” and press “Enter” key.
You can see the system already updated to latest version 1903.