How to open safe mode in windows 10 ?

 to access safe mode in Windows 10, follow the steps below

1. press the windows key type change advanced startup options, and then press enter

2.under the recovery tat 

1. Press the Windows key, type Change advanced startup options, and then press Enter.
2. Under the Recovery tab, select the Restart now option under Advanced startup.
3. After a moment, you see a menu with three options. Select the Troubleshoot option.
4. Select Advanced options, Startup Settings, and then the Restart button.
5. A screen like the one pictured should appear. Select your appropriate Safe Mode option by pressing the corresponding number on your keyboard.

Alternative method

1. Press the Windows key and the R key together to access the Run option.
2. Type msconfig in the Open: field.
3. In the System Configuration window, click the Boot tab.
4. On the bottom left, in the Boot options section, check the box for Safe boot.
5. Select the Minimal option, then Apply, and then the OK.
6. Restart the computer and it should load into Safe Mode.

Note

If you use the above option to access Safe Mode, you need to follow the same steps and uncheck the Safe boot option when you're done. Otherwise, your computer continues to automatically boot into Safe Mode each time you restart it.