2026-06 update issues

Question

2026-06 update issues

John Colantonio 0

The problem started last week when I attempted to run the 2026-06 Preview Update (KB 5095093) (26200.8737) update. After a few failed attempts, I contacted Microsoft Support. The tech ran a remote session, and he indicated that I needed to free up some disk space in order to run the update. This is puzzling because this PC is only 7 months old and has far more storage than my old PC. I ran the Disk Cleanup, cleaned out the “%temp%”, “temp,” and “prefetch” folders, ran a cleanup called CCleaner, and the Bitdefender Disk Optimizer.

Following that session, the computer is still having issues, almost every time I open Outlook or try to reconnect my One Drive, I am asked to reenter my credentials. At startup, I have gotten the message that my Bitdefender Secure Pass has cracked and that I need to reload it, and I have also gotten the message that “Free Space to Continue – Some features on chrome-extension//gcmahhgkpigpfpmdjnbiakmbdegfeh might not work until you clear data that other sites have stored on your device.

Again, none of this happened prior to the attempted update.

This morning I attempted to run the Windows Defender update without success and the Preview Update is still listed as an available update.

I am in over my head and am in need of your help from a real human being.

John Colantonio 0 Reputation points

2026-06-29T12:16:25.7266667+00:00

Correction to above, "Bitdefender Secure Pass has crashed not "cracked".
John Colantonio 0 Reputation points

2026-06-29T13:00:09.03+00:00

I got a response from

David M to this question but unfortunately, I cannot access the page with the full response. I did check to determine how much space I have on my C drive 96.3 MB free of 237 GB. Again, I have no idea why this much space is being used as I have never had this issue before on this or my previous PC. I am unable to sign into my One Drive either. I did not receive an error code that I can recall.

3 answers

Your answer

John Colantonio 0 Reputation points

2026-06-29T12:16:25.7266667+00:00

Correction to above, "Bitdefender Secure Pass has crashed not "cracked".
John Colantonio 0 Reputation points

2026-06-29T13:00:09.03+00:00

I got a response from

David M to this question but unfortunately, I cannot access the page with the full response. I did check to determine how much space I have on my C drive 96.3 MB free of 237 GB. Again, I have no idea why this much space is being used as I have never had this issue before on this or my previous PC. I am unable to sign into my One Drive either. I did not receive an error code that I can recall.

Answer 1

Lars-Erik Østerud 45

My two WIndows 11 PCs get to 100%, then fails ands rollback :-(
Tried to restorehealth with dism. Still same error.

Sick and tired of having to do a repair install EVERY time there is a new update.
How hard could this be MS? The updates are so touchy and fails too often.

0 comments

Answer 2

David-M 117.3K Independent Advisor

Hi. I'm David, and I'm happy to help you.

To be able to assist you better, please clarify the following:

How much free space do you have on the C: drive?
Are you getting an error code from this update? If yes, which one?
Do you have a third-party antivirus installed? (e.g., Kaspersky, McAfee, Avast, etc.) If yes, which one?

Also. What is the current "OS Build" of your Windows 11?

Press "Windows + R", type winver, and click OK.

If you prefer, share a screenshot. Use the shortcut "Windows + Shift + S" to use the screenshot tool.

Be sure to censor your email address if it appears. The Microsoft Q&A is public.

Looking forward to your reply.

John Colantonio 0 Reputation points

2026-06-29T13:07:37.9466667+00:00

I got a response from

I did check to determine how much space I have on my C drive 96.3 MB free of 237 GB. Again, I have no idea why this much space is being used as I have never had this issue before on this or my previous PC. I am unable to sign into my One Drive either. I did not receive an error code that I can recall. I am running Bitdefender Total Security
John Colantonio 0 Reputation points

2026-06-29T13:10:40.6033333+00:00

Version 25H2 Build OS26200.8655
John Colantonio 0 Reputation points

2026-06-29T13:13:22.7266667+00:00

After taking the screenshot, how do I post it to the chat?
John Colantonio 0 Reputation points

2026-06-29T13:17:56.91+00:00

Also, I see only two extensions when I click the icon in Chrome Bitdefender Anti-tracker and Bitdefender Secure Pass
David-M 117.3K Reputation points Independent Advisor

2026-06-29T13:53:50.3433333+00:00

Thanks for the clarifications.

That is unusual for a 7-month-old PC. A 240GB drive shouldn't fill up that quickly unless the user is storing large downloads or installing modern games.

After taking the screenshot, how do I post it to the chat?

After taking the screenshot, paste it (Ctrl + V) into the reply and click "Insert image".

Let's try to see where your storage is being used.

I suggest downloading and installing the free version of the TreeSize app.

(If you have another drive, try installing TreeSize on it, as it might not work on the C: drive.)

https://www.jam-software.com/treesize_free

Then right-click the application shortcut, select "Run as administrator", select the drive to be scanned, and wait for the scan to finish.

Share a screenshot of the TreeSize scan result.

Looking forward to your reply.

Standard Disclaimer: There is a link to a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.
John Colantonio 0 Reputation points

2026-06-29T14:01:27.9866667+00:00

I have a WD Passport Backup that appears to have 105 GB free of 465 GB. Should I try to download the TreeSize app there?
John Colantonio 0 Reputation points

2026-06-29T14:03:55.6066667+00:00
David-M 117.3K Reputation points Independent Advisor

2026-06-29T14:21:11.1+00:00

Yes, you can do that. The best way to do it is to download the TreeSize Free Portable version (which comes as a ZIP file) directly to your WD Passport drive. Download it from the page at the link below.

https://www.jam-software.com/treesize_free/portable.shtml

You can extract it there and run the application straight from the external drive. It won't use any space on your C: drive, but it will still allow you to scan the C: drive to find out what's taking up all that space.

Looking forward to your reply.

Standard Disclaimer: There is a link to a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.
John Colantonio 0 Reputation points

2026-06-29T14:37:15.01+00:00

I need to log off as I have an appointment soon. I look forward to any further suggestions that you might provide. Thank you!
David-M 117.3K Reputation points Independent Advisor

2026-06-29T15:34:43.2033333+00:00
No problem.

Since your PC is only 7 months old and you haven't been downloading huge files, this is likely a system or application glitch hoarding space. All the issues you mentioned (Outlook/OneDrive asking for credentials, Chrome extension errors, and Bitdefender crashing) are direct symptoms of having low free space. When the C: drive is completely full, Windows and your apps don't have enough space to write the basic temporary files they need to function.

Without seeing the TreeSize scan, it is hard to say exactly what is taking up the space, but here are the most common culprits in situations like this:

Massive error logs: Sometimes, when an application crashes (like Bitdefender), it gets stuck in a loop and creates massive hidden text/log files that can fill up a hard drive in a matter of days.

Cloud drive syncing: Sometimes OneDrive settings change unexpectedly and download all your cloud files directly to your local drive instead of keeping them "online-only."

Windows Update cache: Since your issue started around a failed update, stuck or corrupted update files might be hoarding dozens of gigabytes in hidden folders.

Once you return and have some time, running TreeSize Portable from your WD Passport should shed some light on where that storage usage is coming from.

Whenever you are ready, just run the scan, paste the screenshot here, and we will figure out exactly what is safe to delete to get your PC running normally again.

Feel free to ask any questions you may have.
John Colantonio 0 Reputation points

2026-06-30T01:15:20.3433333+00:00

Thanks for the options listed! Checking those out is above my skill set but I know a tech guy that has helped me out before. Hoping he can help trouble shoot.

One thing that I did notice...I also run an external hard drive (WD My Passport) I cannot seem to find the option that allows me to schedule backups, determine which files I want to backup, etc. The most simple solution may be a corrupt cable although it appears on my device list. The other option is that the unit is fairly old, at least 16+ years.

Thanks again.
David-M 117.3K Reputation points Independent Advisor

2026-06-30T13:55:46.8+00:00

That is completely understandable. I just wanted to reassure you that I can definitely help you resolve this full drive issue right here, and you can absolutely do it yourself if you want to give it a shot.

In fact, that full C: drive is very likely the root cause behind all the problems you've mentioned, from the Outlook password prompts and Bitdefender crashes to the reason why you can't see or configure your backup options right now. When Windows completely runs out of room, background software and backup tasks are usually the first things to freeze or fail to load.

To fix this, I just need that TreeSize scan. Once you run it from your WD Passport and share the screenshot, it will show where the largest folders are, and I can guide you on what to check or expand next to find exactly what is safe to delete.

That being said, if you still feel more comfortable waiting and letting your tech guy handle it in person, that is completely your choice! If you do decide to give it a try first when you get back, just drop the screenshot here, and I'll be happy to help you fix it.

Feel free to ask any questions you may have.
John Colantonio 0 Reputation points

2026-07-01T13:11:22.11+00:00

Thank you for your assistance and kindness. Truly appreciated. Hoping that I won't need to bother you again, but the way this has gone so far, I won't make any predictions. :-)
David-M 117.3K Reputation points Independent Advisor

2026-07-01T13:43:29.4133333+00:00

You are very welcome! It is absolutely no bother at all. Helping out is exactly what I'm here for.

Please don't hesitate to reply if you decide to give it a shot yourself.

Feel free to ask any questions you may have.

Answer 3

Vishal Das 0

I installed the 2026-06 Preview Update (KB5095093) (26200.8737), and it downloaded and installed normally to 100% and showed "Pending restart" so when I clicked on Update and Restart, it went to the black Windows installation screen, reached 98%, and then displayed the message: "Something didn't go as planned. No need to worry - undoing changes. Please keep your computer on." For antivirus, I have Kaspersky installed.

Vishal Das 0 Reputation points

2026-07-01T08:24:32.1733333+00:00

I have 150GB free space on my C: drive.
While updating I am not getting a error it installs then when reboots for updating it shows, "Something didn't go as planned. No need to worry - undoing changes. Please keep your computer on." After update fails and system gets booted into Windows, inside Windows Update I see this error code for this exact preview update "0x800f0922 ".

I checked Winver and I am currently on 25H2 and OS Build is 26200.8655