Windows 10: System Restore Page, pw not working, blackscreen

I'm at the system restore page and it says Hi, Administrator but when I put in my pw it says it's wrong, I did a system reinstall because my screen is black I thought this would help and now I'm stuck at the pw part so I can't see if this is going to let me see my desktop again, and I've tried different pw to see if they work and so far nothing.please help! I'm desperate

:)

 

Blackscreen after trying to fix system restore

Hi,

I've tried to use my restore point but it always failed, so I applied a fix I found.

However, this caused a blackscreen after rebooting. I've already tried cutting off the power and rebooting multiple times now, it shows the motherboard logo (BIOS works) but when the log in screen should normally appear there's just a blackscreen now. When
I click around the cursor will appear (occasionally the loading symbol as well) but the blackscreen seems to be infinite.

Here's what I did (trying to fix system restore) right before the blackscreen problem (I'm not 100% sure that the fix caused the blackscreen but I didn't change anything else recently). I wanna add that I noticed that the fix (original: System Restore failed 0x80070091 in Windows 10 (Solved) • Repair Windows™)
is only recommended for another error code, mine was a little different. The restore fix isn't the most important problem anymore though, I'd just like to fix the blackscreen.

1. Hold down the “SHIFT” key and go to Power -> Restart.

2. After PC restarts, choose: Troubleshoot -> Advanced Options –> Command Prompt.

– Your computer will restart again –

3. Choose an Account (with admin privileges), type the password (if any) and click Next.

4. At command prompt give the following commands in order (press Enter after typing each command):

diskpart

list volume

5. Now locate the Windows Drive letter. (the drive where Windows installed).

e.g. As you can see at the screenshot bellow, the Windows drive letter is D:

0x80070091 Windows 10



6. Type exit to close the DISKPART tool.

7. Now navigate to the Program Files folder on the Windows drive, by typing the following command: *

cd /d D:\Program Files

* Note: Change the letter D according to your case.

0x80070091 System Restore Windows 10



8. Give the following command to unhide the WindowsApps folder.

attrib –h WindowsApps

rename WindowsApps



9. Then rename the WindowsApps folder to WindowsAppsOLD, by giving this command:

ren WindowsApps WindowsAppsOLD

rename WindowsApps folder Windows 10



10. Finally type rstrui to start System Restore.

rstrui



11. Follow the on screen prompts to restore your system to a previous working state. *

* Note: After restore, proceed and disable the Windows Updates until Microsoft correct the problem.

 

Added system PW now can't access system

I added a system PW today but when I tried to get back into the laptop I received "This computer system, #8HDK8N1-595B, is protected by a password authentication system. You cannot access the data on this computer without the correct PW". Since it's a Dell inspiron 1545 my tech support suggested this site for assistance. I saw some other posts similar to this where they were given another codes to try. Can anyone help? Thanks.

 

Blackscreen and malicious software

Hello,

I suggest you to restore the system to the previous point where PC was working normally. To do so kindly follow the below given steps:

• 
  Press Windows + I key and click on Update and security.
  
• 
  Click on Recovery, and click on
  Restart under Advance startup.
  
• 
  In the Windows Recovery Environment, on the Choose an option screen, click
  'Troubleshoot'.
  
• 
  Click, Advanced Options and then click on
  System Restore.
  
• 
  Follow the onscreen suggestion to restore your PC to earlier point.
  

Hope this helps. Please do let us know if you need any further assistance.