"The user profile service service failed the sign-in." Help!!

When I try to login, I get the following error message:

"The User Profile Service service failed the sign-in.

User profile cannot be loaded."

I am literally unable to use my HP Envy laptop, which is running Windows 10, because of this. I do not even know how to get into safe mode. Please--I need urgent help with this.

EDIT: Though I haven't found safe mode yet, I was able to access system diagnostics via Escape (while rebooting). I tried to do a system restore, but it said I had errors on my hard drive and made me check and fix those errors.

Next I tried Recovery Manager. But this just gives me a blue screen. Nothing comes up.

Method 1: Safe mode

1. Turn on your computer and repeatedly press the esc key until the Startup Menu opens.
2. Begin a System Recovery by pressing F11. If prompted, select your keyboard layout.
3. The Choose an optionscreen displays. Click Troubleshoot.
   4. Click Advanced options.
   5. Select Command Prompt to open the Command Prompt window. You might need to select your account and enter your password to continue.
   After the command system prompt, enter the command for the safe mode option you want. Enter the information exactly.
   
   
   The computer responds with The operation completed successfully when you have entered the command correctly.
   
   • Enable Safe Mode - Type:
     bcdedit /set {default} safeboot minimal and press Enter.
   • Enable Safe Mode with Networking - Type:
     bcdedit /set {default} safeboot network and press Enter.
   • Enable Safe Mode with Command Prompt - Type:
     bcdedit /set {default} safeboot minimal and press Enter:
     bcdedit /set {default} safebootalternateshell yes and press Enter.
     
     7.
   • Close the Command Prompt window by clicking the X in the upper right corner of the Command Prompt window.
   
   

• The Choose an optionscreen displays. Select Continue and sign in to Windows with your account name and password.

Method 2: Restore point:

Now, do the steps 1,2,3,4 in method 1

1. This time, click System Restore.
2. Choose the latest restore point you can find.
3. Click next.

What does this do?
It restores your laptop to a previous time. %99 of your personal files will stay.
Note: Do not restore your computer to a date that is more than 3 month. That will cause some data loss. However, they are most likely to remain.
Did I help? Leave me a so you can help me in return!

Moments later, the Recovery Manager comes up. I decided to just go ahead and start Windows without trying a system restore, and...it's back up and running! Looks like fixing that hard drive error caused it.

The last thing I was doing before all this happened was to try to graph a plot in Python using matplotlib. It crashed my computer, twice, presumably due to a huge data array. But to induce hard drive errors?? I think I'm going to explore my options for creating a restore point, etc., should there be more to this story.

Hmm, I may not be out of the woods yet. Every single time I reboot, my computer wants to do a disk scan. Going to try to fix this via an error check of the drive.

Hi tollbooth! You can open a Command Prompt with admin rights and run the following command to tell Windows not to scan disk at next reboot:

Code:

chkntfs /x D:

Replace D: with the drive letter of your desired partition.