Windows 10: Windows 10 Update Assistant stuck on 99% for 2 hours, won't move to 100.

I have tried updating Windows 10 to the latest version on my laptop. It couldn't refresh to get new updates after the May update. Lately there have been some personal matters that kept me up and I missed any new update coming because I have no internet at home. I tried services.msc and Windows Update was disabled and skipped all because of no connection at home.


I tried updating with Windows 10 Update Assistant. Spent hours updating my laptop to the latest version, but now at the moment it's stuck on 99% out of 100. It started updating about 7 hours ago as far as I remember. Before this step, it had to verify the update.


My laptop specs are 8GB of virtual memory, 1TB of HDD, Intel Core i5 7th Generation @2.50 GHz and I don't remember the video card. The question is; how long will it take for the assistant to move to 100% as it's been stuck on 99% for 2 hours already?


If I terminate the assistant will I start updating from scratch again?


Thank you in advance!

:)

 

Windows Updates stuck at 99% for 5 hours

Hi,

As you are facing issues with installing updates which stuck at 99%. Do not worry we will help you with this issue.

• Do let us know if you are able to see any error code / error message with this issue?
• Are you referring to installing updates on Windows 10/ upgrade to Windows 10 from previous operating system?

I suggest you to refer to the below post replied by Arvind Ram
on July 21, 2016 and check if it helps.

Windows 10 Upgrade Assistant is stuck at 99%

Hope it helps. Update us the status of upgrading to Windows 10 for further assistance.

Thank you.

 

Windows 10 upgrade assistant stuck at 99%

Here is what I've learnt about upgrading to Windows 10, in the past few days.

Media Creation Tool

The good thing is that the upgrade completes smoothly once the download has completed.

The bad thing is that it doesn't resume interrupted downloads. The download is over 3GB which is almost 3x the amount downloaded by UpgradeAssistant.

Common Problems<br>
Once interrupted (esp. crashed or rebooted) you won't be able to launch the tool again without manually deleting the $Windows.BT and $Windows.~WS folders first. However, in order to delete these folders you'll need to use Process Explorer (from sysinternals) and forcefully close all open handles to files in these folders. Search for "$Windows." and close every handle that you find.

In my case, after each interruption (I had four) it would add 3.02GB to the download - basically start downloading +1 BITSXYZ.tmp files. With 5 downloads of over 15GB I had to say goodbye to this method as nothing I did could reset the tool to its initial state.

Don't use this method unless you have a reliable power-source and good internet.

Upgrade Assistant App

Very good at resuming broken downloads and it downloads only what is needed for your system therefore a much faster method. The downside is that the upgrade isn't a smooth process.

Common Problems<br>
Upgrade will get stuck at 99% and there doesn't seem to be a single solution that works for everyone. First, its better to resolve missing driver issues before upgrading (as suggested by other answers). Here is what I did to get past 99%.

1. Let it run for sufficiently long time say 3 hours.
   
2. Set startup type for the windows service: "Windows Update" to "manual" for the duration of the upgrade, this will prevent it restarting itself when you perform the next step.
   
3. Stop the windows service: "Windows Update" and wait a couple of minutes
   
4. If this doesn't help start the service again.
   
5. Use process-explorer to kill SetupHost.exe that is a child of WindowsUpgradeAssistantApp.exe.
   
6. Wait for the assistant to report "Something went wrong," and use the "Try Again" option. This should repeat the usual download, verify and install cycle except that at about 45% a blue interface will popup.
   

The new popup UI will start in "Getting Updates," phase and believe it or not there are far more reported incidents of that getting stuck. To resolve it:

1. Stop "Windows Update" service
   
2. Clear all contents of "C:\Windows\SoftwareDistribution"
   
3. Start the service again (if needed).
   

This should hopefully unblock the tool, but it will come back to the "Getting Updates" state again. Give it some time and if it gets stuck again, follow Step 1 and 3-4.

Once past this point the "real upgrade" would begin and hopefully that would be a smooth process.

 

Windows 10 Update Assistant stuck 99%

Hi, you might like to look at this:
Error upgrading windows 10 at windows 10 update assistant - Microsoft Community

Note that until quite recently there have been numerous issues with MS's Windows Update servers not responding, varying by region and ISP.