W10 needs at least 1 – 2 hours to configure. No different from previous OS's which also take 3 – 4 hours post logon due to the fact there are 350+ updates to download & configure.
Once W10 has finished the installation and you are logged in and on the Desktop screen, locate the HDD light. You will notice the light to be illuminated or blinking and the Taskbar will flash periodically. Windows is now configuring the installation, meaning all Windows & accessory driver updates. Allow the system to run unimpeded until the light stops flashing (may take 1 – 2 hrs). If the unit is not equipped with a HDD light, allow the system to run unimpeded for at least two hours.
DO NOT attempt to update any drivers or run games, the configuration process is taking care of this. Do not RESTORE or REFRESH during this process as you may cause your system to CRASH.
You will run into issues if you do not allow for configuration such as programs not working correctly, internet freezing, slow jerky mouse movements, or sound issues to name a few.
Do not allow the computer to sleep or CPU to shut down. Change your power settings until W10 is configured
Now you must "Trust your PC"
Click on the Callout down by the clock (likely white) and click on the notification to trust your PC. Microsoft will send you a code to enter
Restart & enjoy . . .
Patience. Young one.
The install will commence when you shut down.
Specifically how and what did you download, and from where.
What are you attempting to do?