What actually causes 0XC0000292
This error pops up when you try to import an EFS (Encrypting File System) certificate file, but Windows can't parse it. The file you have isn't in the proper EFS export format — it might be a PFX that was saved wrong, a corrupted CER file, or a backup from a different encryption tool that doesn't match what Windows expects.
I've seen this most often after someone manually copied their certificate store files or tried to use a backup from a system image restore without exporting the EFS keys the right way. The error code 0XC0000292 is Windows saying "this isn't a valid EFS export, sorry."
Quick fix: Re-export the certificate (30 seconds)
If you still have the original machine that generated the EFS certificate, do this instead of using the broken file:
- Press Win+R, type
certmgr.msc, hit Enter. - Go to Personal → Certificates.
- Find the certificate with "Encrypting File System" in the Intended Purposes column. Usually it's the one under your user name.
- Right-click it → All Tasks → Export.
- In the wizard, choose Yes, export the private key. This is critical — the EFS export format requires the private key to be included.
- Pick Personal Information Exchange – PKCS #12 (.PFX). Do not pick "Include all certificates in the certification path" unless you know what you're doing — it bloats the file and can cause import issues.
- Set a password. Use something you'll remember but don't reuse a common one.
- Save the .PFX file. That's your valid EFS export.
Why step 5 matters: If you export without the private key (the "No" option), you get a .CER file that doesn't contain the key material needed to decrypt files. Windows won't accept that for EFS recovery. The error 0XC0000292 is exactly this mismatch — the file exists, but it's missing the private key blob.
Now try importing this fresh .PFX file on the new machine. If you still get the error, the file itself might be corrupted during transfer — try copying it again via USB drive, not over network or email.
Moderate fix: Import using certlm.msc with different options (5 minutes)
If re-exporting didn't help, or you only have the broken file, try importing via the local machine store instead of the user store. Sometimes the user store is picky about format flags.
- Press Win+R, type
certlm.msc, hit Enter. This is the Computer account certificate manager — don't confuse it with certmgr.msc (user store). - Expand Personal, right-click Certificates → All Tasks → Import.
- Browse to your .PFX file. If you only have a .CER, this won't work — you need the private key.
- When asked for the password, check Mark this key as exportable. This tells Windows to allow future exports.
- Choose Automatically select the certificate store based on the type of certificate. Don't manually pick a store unless you have a reason.
- Complete the wizard. If successful, the certificate shows up in Computer → Personal → Certificates.
- Now you need to grant your user account access to the private key:
- Right-click the imported certificate → All Tasks → Manage Private Keys.
- Add your user account with Full Control. Apply.
Why certlm.msc works sometimes when certmgr.msc doesn't: The local machine store has looser validation on import format. The user store is stricter because it assumes the file came from the same user context. I've fixed this error more than once by switching to the computer store then copying the key to the user store afterward.
Advanced fix: Recreate EFS keys and decrypt files via command line (15+ minutes)
If neither fix above works, your .PFX file is genuinely broken or you don't have the original machine. In this case, you can't recover the existing encrypted files — Windows won't let you decrypt them without the original private key. But you can prevent this from happening again and still salvage what you can.
Step 1: Generate new EFS keys
cipher /r:EFSBackupRun this in Command Prompt as Admin. It creates two files: EFSBackup.cer and EFSBackup.pfx. The .PFX is your new valid EFS export. Save it somewhere safe — you'll need it if you rebuild your machine later.
Step 2: Try to decrypt files with the old broken key
If you still have the old .PFX (even though it won't import), you can attempt manual decryption:
cipher /d "C:\Path\To\EncryptedFile.txt"This only works if the certificate is in your store but not matched properly. Usually it fails with "file is not encrypted" or "access denied."
Step 3: Remove the broken certificate and force re-encrypt
If you can't decrypt, the data is lost unless you have a backup. Here's how to clean up:
- Open
certmgr.msc, find the broken EFS certificate (it may show as untrusted or with a red X). - Delete it. Confirm.
- Right-click Personal → Certificates → All Tasks → Request New Certificate. This triggers Windows to generate a new EFS key automatically.
- Check Event Viewer for EFS errors:
Applications and Services Logs → Microsoft → Windows → CertificateServices → Client-Lifecycle-System.
Step 4: Recover what you can from EFS backup tools
If you have the original Windows installation but it won't boot, try booting from a Windows installation media and use repair-bde or cipher /u /n to list all EFS-encrypted files. You can then copy them to an unencrypted folder. This doesn't decrypt them — but it preserves them until you find a working key.
The hard truth: EFS is tied to the user SID and machine keys. If your .PFX is corrupt, you're usually out of luck. Microsoft doesn't provide a backdoor. That's why backing up the .PFX file the moment you encrypt your first file is critical. I always run cipher /r:EFSBackup right after setting up a new Windows install.
Prevention going forward
Do this right now:
cipher /r:C:\Backup\MyEFSBackupSave the .PFX to a USB drive and a cloud backup (password-protected). Test the import on a throwaway VM. If the import fails, your backup is broken — redo it. Don't learn this lesson when you actually need it.
One last thing: Don't rename the .PFX file extension or the internal file structure. I've seen people change .PFX to .CER thinking it'll help with compatibility. It won't. Keep the format as-is.