After installing May 2023 Security updates, viewing Effective Access in the Advanced Security Settings dialog box for shared files or folders was lost for several users. Microsoft has recently acknowledged this issue and reported that the file explorer might continue to use CPU resources even after you close the Advanced Security settings dialog.
Here’s what Microsoft says about the high CPU usage with Shared files or folders –
On affected devices, when the “View effective access” button is selected, you will receive the message “Computing effective access….” but the results of the query might not be displayed and explorer.exe might continue to use CPU after the Advanced Security settings dialog is closed.
What’s this issue really about?
Effective Access is an in-built feature on Windows and it allows you to view the effective permissions for a user, group, or device account. If you have a domain member account, you may also evaluate the impact of a potential addition to your account’s security token.
However, if you now click on the effective access button, you will simply receive a message stating “Computing effective access….”, but, the results of the query might not be displayed. On top of this, the file explorer might continue to use high CPU resources even after you close the Advanced Security settings dialog.
This error started occurring only after you install KB5026372/KB5026368 on your Windows 11, versions 22h2/21h2, or even on systems running Windows Server 2022. The developers are working on a resolution to this problem, and you can hope for that to come by the end of June.
Note: If you are using the home edition of Windows 11, you won’t experience any issues related to Effective Access.
Fix – Effective Access Issues in Shared Files or Folders
If you are also experiencing high CPU usage while opening the Advanced Security Settings dialog box for shared files or folders, you may apply either of these solutions –
- Sign out of your user account and then restart your computer. There’s a possibility that this issue resolves afterward.
- If there is still high CPU utilization, you may roll back your device to your previous build update using CMD, or through Settings.
You may also wait for the next non-security update (due on 24th June) if you don’t frequently use this “Effective Access” on your Windows PC.
The tech giant has also resolved an earlier issue in which Saving or copying files intermittently fail. If you are still facing this issue, install the latest security update that comes in June 2023. For Windows 11, version 22h2, it was KB5027231 and KB5027223 for version 21h2.
