Windows 10: Failed login "you need to install an app for this task"

I have the same problem as the guy from the picture I added, but I don't have a restore point and I can't do a PC reset where I keep my data because it will tell me that something failed and it cant be finished. I really don't want to lose my data, is there any way I can keep my data and not do a full reset?

:)

 

No restart button in task manager

another easy way to kill tasks, download and install Winaero Tweaker(free) and theres a setting to add a Kill non responding tasks using the desktop right click menu. When you place your cursor on the desktop anywhere and right click the option is at the top of the list, Very handy and you dont have to go through all those steps and well Winaero Tweaker has alot of cool Windows tweaks. Just posting a different suggestion, Im sure your ok with what was suggested here.

 

KB4025339 Fails Install 0x80070564

Thanks
I am trying Eagle 51's suggestions now. Windows Update troubleshooter found a bunch of errors and fixed all but one.The update is trying to download KB4025339 again. I'll see what happens. At step one troubleshooter finishes with one error unresolved "Potential Windows Update Database Error Detected-Not Fixed". Windows update stalled at 0%.

At step 2 same troubleshooter error. The KB finished a new download failed to install.
Did step 3 KB has downloaded but fails to install.

If Eagle's suggestion doesn't work I'll try EdTittel's suggestion

Tried bothe Eagle & Ed 's suggestions - do not work. Anyone else?

I have noticed that the latest update for my nvidia drivers has failed to update. Wondering about that!

 

Windows 10 self installing apps I have uninstalled!

Hi,

Thank you for posting your query on Microsoft Community.

I suggest you to follow the below steps and check if it helps:

Step 1: I suggest you to end the task in task manager.

• 
  Go to task bar
  
• 
  Right click on task bar
  
• 
  Select task manager
  
• 
  Click on apps and end the task.
  

Step 2: Go to appwiz.cpl and locate to the apps, right click on apps and uninstall apps.

If the issue persists I suggest you to create new user account and check if it helps.

Step 3: You may check the same issue with the new user account.

Try these steps to create a new user account and check if it fixes the issue. Refer to the steps below to create a new User Account:

• 
  Go to Settings.
  
• 
  Choose Accounts
  and then select Other User Accounts towards the left.
  
• 
  Select Add an Account.
  
• 
  Enter a user name and hit Next.
  
• 
  Click on Finish.
  
• 
  Sign out from the current Account and Log into the new account.
  
• 
  Check if issue persists.
  

Please let us know if you need further assistance.

Thank you.