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As per the description provided, you are unable to encrypt some files as the encrypt contents button is grayed out.
Are you trying to encrypt the files which were already present in the Windows 8 or were it transferred from a different computer?
I would suggest you to follow the methods below to check if it resolves the issue:
Method 1: Run SFC scan to fix corrupted files in the computer:
a. Type “cmd” on the start search and select
b. Right click on command prompt and left click on
Run as Administrator.
c. In the command prompt, type
sfc /scannow and press Enter.
Method 2: Let’s run a virus scan:
Microsoft Safety Scanner
Note: Any data files that are infected may only be cleaned by deleting the file entirely, which means there is a potential for data loss.
Method 3: Let’s check in new user account to check if there is any corruption in the old user account:
Create a user account
Note: If the issue is resolved, transfer the data from old account to new account.
a. Open Computer
b. Select C drive
c. Open “Users”
d. Open your user account
e. Copy the contents and paste it in the new user account.
Please perform these recommended steps, review the additional information provided and post back if you are still experiencing the issue. I will be glad to provide you with additional options.
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Same problem. Running the standard version of Win8, OEM preinstalled.
Tried all the steps given, but still unavailable.
I found I can run "Cipher.exe" in a dos prompt, although I did not try encrypting anything.
The EFS service is shown as STOPPED, and the start type is set to "Manual Trigger" - is this correct? I have not changed status of this.
1 person was helped by this reply
By default the services would be stopped and set to manual. You can click on
start and there's no harm.
Try in clean boot to check if there are any conflicting programs/applications:
How to perform a clean boot to troubleshoot a problem in Windows Vista, Windows 7, or Windows 8
Note: When the troubleshooting is over do not forget to reset the computer to normal startup.
Hope the information helps.