Windows 10: Permission from s-1-5-21 ?

It shows I need permission from s-1-5-21 to delete a file or folder in an external drive. I went to security and changed ownership to my microsoft account. Then it says need permission from desktop/user . Changed to users ; now need permission from desktop/users .Changed to administrators ; now says permission from Administrators is needed. Please help. How can i delete or copy cut files to and from my external drive ?

:)

 

HKU S-1-5-18 TO S-1-5-21-1377943898-483413162-3496510108-1001 AND S-1-5-21-1377943898-483413162-3496510108-1001 Virus

Hiii,

I have some how downloaded this virus HKU S-1-5-18

HKU S-1-5-19,

HKU S-1-5-20

S-1-5-21-1377943898-483413162-3496510108-1001 S-1-5-21-1377943898-483413162-3496510108-1001 _classes

I have got installed with so many viruses ,and get affected by them,

so inorder to remove them I reset my pc by removing apps and keeping only files and folders.

by doing this my windows got installed again on resetting the pc.

but this HKU s-1-5-18 to s-1-5-21 shown above virus was still in the Regedit (register keys)

I am trying to delete this folder in regedit but it is saying that unable to delete the specified values and also showing I don't have administrator permissions

After installing this viruses my Windows Defender Check Apps and Files in App & browse Control is off and greyed out

showing in defender this is managed by your administrator ,but I am the administrator



again in properties security setting this s-1-521 user account is automatically created and gained administrator permissions

so please,help me with this how to fix them and to check are there any other viruses

I tried malware bytes and emsisoft but they are unable to clean them

so please help me ,to how to get rid of this and permenantely delete them

 

S-1-5-21-119163587-1573839180-90999006-1001

I give up, what is it - and what's a "security ownership panel?"

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FYI...

Well-known security identifiers in Windows operating systems:

https://support.microsoft.com/en-us...rity-identifiers-in-windows-operating-systems

Unknown User in security settings s-1-5-21 ... 1001

Unknown User in security settings s-1-5-21 ... 1001 - Can someone please review? - Virus, Trojan, Spyware, and Malware Removal Help

Account Unknown (S-1-5-21-130066488-785734366-1129733132-1000)??

https://www.tenforums.com/user-acco...21-130066488-785734366-1129733132-1000-a.html

How to understand the anatomy of security identifiers

How to understand the anatomy of security identifiers | TechRepublic

 

No permissions

Hi,

I would suggest you to right click on the user's folder for your profile and check if the permissions shows as "read only'. If this is the case, it might be causing the issue. In this case, I would suggest you to go to C:\User folder, right click on the
folder with your username and follow these steps:

• Open the properties of the main user profile folder where the files are located (such as Documents, Pictures, etc).
  
• Go to the Security tab and click Advanced.
• Check the box at the bottom of this window. It is labeled "Replace all child object permissions with inheritable permissions from this object" and then click Ok.
  

This does a one-time action that replaces the security on all the files/subfolders. It’s one-time, so you won’t find that box checked if you peek at it later. Try these steps and let us know the results for further assistance.