Select Update and Security from Settings – Recover, and then run Restart Now from Advanced Start.
When you restart your PC, you can start it in safe mode (using networking) by selecting 4 or F4 (5 or F5 if you need to use the Internet) key in the list of options.

For more information, please refer to the link below.

https://www.lifewire.com/how-to-access-advanced-startup-options-in-windows-10-or-8-2626229

Go to Power – Restart, press and hold the Shift key, and then press Enter. You will see the Select Options screen.
Troubleshooting – Advanced option, select command prompt to get into recovery console. For more information, please refer to the link below.

https://www.lifewire.com/how-to-access-advanced-startup-options-in-windows-10-or-8-2626229

This is a problem caused by a conflict after the update or an unknown problem.
Delete last update and reinstall the operating system to fix the problem.

If you get the message saying that a file is corrupted, the storage device might have a problem (cable failure, logical failure, or bad sector creation, abnormal temperature, etc.).
Proceed a boot recovery from the recovery console through bootcfg / rebuild

There are many reasons for the blue screen.
It could be a hardware malfunction, a crash on device driver, kernel or program or a malicious code infection.
Therefore, it requires to check thoroughly of both software and hardware.

Easiest solution that you can try is to run into safe mode and remove a recently installed program or driver.

This problem is caused by an Autorun malware infection, please run a scan with antivirus program.
All original files would be changed to hidden properties, so please find hidden files in Windows Explorer and remove them.

It could be a problem with the codec program that plays the video and sound.
Delete the codec program and reinstall it to fix the problem.

It is more likely to have issue on hardware.
Mostly graphic card may have a problem.
Check the status of your computer, graphic card and cable.

Certain programs unwillingly modify your browser's Start Page to attract traffic and advertisement.
If the Start Page you have set up is constantly changing automatically, use AppCheck Cleaner to resolve the problem.

AppCheck Cleaner can remove malicious programs and initialize which affect web browser experience.
If web browser (Internet Explorer / Firefox / Chrome) has the unknown programs installed, it can be resolved using AppCheck Cleaner.

There are various reasons when the Internet is slow or unstable.
It can be caused by unwanted programs or recently installed security programs.
If it is infected by the malicious code, AppCheck Cleaner clears and restores it to its normal state.
 
[In case of infected by malicious code]
1. Caused by performing an unknown task due to a malicious code infection
2. Caused by malware which re-routes your connection.
 
AppCheck cannot resolve the following cases:

[Normal cases]
1. Operating System update – Wait until Windows OS update is completed.
2. Other program or application update – Wait until the update of program or application is done.

[Hardware or external issues]
1. Home router issue – Reboot your router or contact router manufacturer.
2. Internet connection issue – Reboot the modem or contact Internet Service Provider

A ransomware infection can slow down your computer for encrypting files or being used to crypto currency mining.
Optimize your PC's performance with the AppCheck Cleaner; removes malware and resets invalid configuration of your PC.

PreparingMalicious codes can be removed by using the AppCheck Cleaner.
Simply clicking the scan button on main screen.

ActiveX is often installed automatically on your PC by malicious websites to access information directly to your PC.
Some banks require for installation, but you can delete them after completing your task.

AppCheck Cleaner removes malicious code disguised as ActiveX but does not remove normally installed ones.

Most of the reason that pop-up ads or ad banners keep appearing is programs that were recently installed may include adware.
Try to find and delete the list of programs you have recently installed in control panel.
AppCheck Cleaner features easy removal of adware.