Windows 10: EFS Prompted to backup file encryption certificate and key on BitLocker enabled computer

One of our staff get EFS popup prompted to backup file encryption certificate and key as per screenshot below.We are not using EFS on this computer instead we are using BitLocker to encrypt all volumes on this computer.Double checked and run "CIPHER.EXE /U /N" and result shows no file was encrypted.Checked certificate as per this URL: https://appuals.com/encrypting-file-system-efs/ Found one certificate that might cuase the problem was created on date that our staff report the problem.Any ideas what software or action that trigger this certificate to be created and is it safe to delete ?

:)

 

Backup the EFS encryption key file

Bitlocker and EFS are not the same thing. Bitlocker is full-disk encryption; EFS is per-file encryption.

I agree that it's probably some IT policy from your university account. You should backup your key: Backup Encrypting File System Certificate and Key in Windows 10 Security System Tutorials

 

Backup the EFS encryption key file

My IT support staff told me that it doesn't depend on them. So why did those message start to appear?
Anyway, do you think I should make a copy of certificates on a external storage or try to decrypt all files?

 

Backup the EFS encryption key file

Yesterday I installed OneDrive app and linked it to my office 365 enterprise University account. Since then, every time I turn on my pc, I receive a warning about backup of the encryption key from EFS application. But I have never used bitlocker.
I did some search online and I got the list of all encrypted files: there are thousands of files and belongs to Apps, like facebook, onedrive, inkscape and so on.
So my questions are:

• why did that message suddenly appear?
• why are those files encrypted?
• do those files have to be encrypted?
• bitdefender has just found Gen:L: [email protected]@bq2Abpn in temp folder. Could I have got a ransomware that is encrypting all files?

Thanks in advance!