STATUS_NO_USER_SESSION_KEY 0xC0000202 Fix

You're working on a Windows 10 machine or a Windows Server 2019 box, and suddenly an application crashes or a scheduled task fails. The event log shows error code 0xC0000202 with the description „STATUS_NO_USER_SESSION_KEY - There is no user session key for the specified logon session“. This usually happens when a program tries to access a network share or run a process under a user account that's been logged off or whose session expired. I've seen it most often with service accounts that run batch jobs or with users who connect via Remote Desktop and then disconnect without logging off properly.

What causes this error?

Every user logon session in Windows creates a session key. That key is a small piece of cryptographic data used by the Local Security Authority (LSA) to protect network authentication. When a user logs off, their session gets destroyed. But sometimes a service or a scheduled task still holds a reference to that old session. It tries to use the key, and boom — the system returns 0xC0000202 because the session key is gone.

Another common trigger is when you have cached credentials stored for a network resource (like a mapped drive) and the user account behind those credentials logs off or changes password. The cached credential still points to a session that doesn't exist anymore. The error can also show up if you're using Kerberos authentication and the ticket-granting ticket (TGT) expires before the application tries to use it.

Fix it step by step

I'm going to give you the real fix, not the fluff. Most online guides tell you to restart the machine. That sometimes works, but it's a band-aid. Here's what actually fixes the root cause.

Step 1: Find which logon session is causing the trouble

Open Event Viewer. Go to Windows Logs > Security. Look for events with ID 4771 or 4648 around the time the error happened. These events will tell you the account name (like DOMAIN\ServiceAccount) and the process that failed.

If you can't find the exact event, run this command in an elevated PowerShell window to list all active logon sessions:

query session

Look for sessions with a status of „Active“ or „Disc“. A „Disc“ session means the user disconnected but didn't log off. That's often the culprit.

Step 2: Log off disconnected sessions

If you see any sessions in „Disc“ state for the account that's failing, log them off. Use this command, replacing SESSION_ID with the actual ID from the previous step:

logoff SESSION_ID

Wait — you might be thinking „But it's a service account, it shouldn't need a logon session!“ You're right, it shouldn't. But sometimes the service is configured to run under a user account that also has an interactive session. That session gets disconnected, the key gets purged, and the service can't authenticate. Logging off the session forces the service to create a fresh one next time.

Step 3: Clear cached credentials

Open Control Panel > User Accounts > Credential Manager. Under Windows Credentials, look for any entries related to the failing account or resource. Remove them. This forces Windows to ask for fresh credentials next time.

After removing them, restart the service or scheduled task that was failing. Don't restart the whole computer unless you're lazy — just the service.

Step 4: Check the service or task configuration

If the error is from a scheduled task, open Task Scheduler. Find the task, right-click, go to Properties > General. Look at the „Run whether user is logged on or not“ option. If it's checked, that's good. But you also need to check Configure for — set it to Windows 10 / Windows Server 2016 or whatever your OS version is.

If the error is from a Windows service, open Services.msc. Find the service, right-click, open Properties > Log On. Make sure the account is typed correctly and the password is current. Then click Apply.

Step 5: Reset the Kerberos ticket (if you're in a domain)

Open an elevated command prompt and run:

klist purge

This clears all cached Kerberos tickets. Then run klist again to verify the cache is empty. After that, try to access the network resource again. The system should request a new ticket automatically.

Step 6: Reboot the machine (only if nothing else worked)

Look, I hate saying „restart“ because it's the IT cliché. But sometimes the LSA process gets stuck and won't release orphaned session keys. A reboot flushes everything. Do it as a last resort, not a first step.

What to check if it still fails

If you've done all the steps above and the error still pops up, check these three things:

• Time synchronization: If the machine's clock is off by more than 5 minutes from the domain controller, Kerberos will reject authentication. Run w32tm /query /status to check. If it's off, re-sync with w32tm /resync.
• Password expiration: If the account's password expired, the session key can't be renewed. Check the account in Active Directory Users and Computers. Reset the password if needed, update it in the service or task configuration, and restart.
• Group Policy restrictions: Sometimes a GPO blocks certain accounts from creating user sessions. Check for policies under Computer Configuration > Windows Settings > Security Settings > Local Policies > User Rights Assignment. Look for „Deny log on locally“ or „Deny log on through Remote Desktop Services“. If your service account is listed there, remove it.

That's it. Most cases of 0xC0000202 are solved by step 2 or step 3. Don't overthink it. The user session key is tied to a session that doesn't exist anymore — your job is to clean up that dead session and let the system start fresh.