Update to v2004 Fails - 2nd Boot - System Thread Exception Not Handled

Hello @TV2,
If you're using a 3rd party antivirus, it is suggested to completely uninstall it vs just disable it.

I think you lack of disk space is going to be a big factor in failure here. Look and Settings -> Apps and feature (sort by size) and see if you can uninstall more apps you don't need to make more space.

If you're selecting to save personal apps and files and the install is trying to create Windows.old to save old Windows and all you apps and files, it's probably choking on lack of disk space during the upgrade.

A good tool to help determine why an upgrade failed is Microsoft's SetupDiag -

https://docs.microsoft.com/en-us/win...rade/setupdiag

The posted V2 had not collected log files.
When running V2 > click extract all (see instructions).

TV2 said:

I have made 4 attempts to upgrade a laptop from Windows 10 v1909 to v2004.

This is an Asus A53SD-TS71 (K53SD Series)
Running most current BIOS (208)
Core 17-2670QM
8GB RAM
Nvidia 610M

1st Attempt through Windows Update
2nd Attempt through Windows 10 Upgrade Assistant (do not use for upgrade failure troubleshooting)
3rd Attempt through Media Creation Tool ISO on USB (after updating all drivers)
4th attempt through Windows 10 Upgrade Assistant (after freeing up hard disk space > 20GB free)

Stop Code: "System Thread Exception Not Handled" - 0xC1900101
(This was BSOD bugcheck 7E)


I have gone through the device manager and updated each driver one by one
Ran SFC and DISM. No issues.
I always disable AV before starting (uninstall any non-Microsoft AV when upgrade failure troubleshooting)
There was only 19.8GB of free space the first 3 attempts. I freed up over 10GB for 4th attempt. (start with > 35 GB free space when upgrade failure troubleshooting)

V2 Logs: Attached


Non MS Programs:
_





More diagnostics to come.

The log does show that Avast is still installed.

With their history, I personally would not recommend Avast to anyone anymore.

Going forward, you might consider using another AV product.

Some good resources to start with for research -

AV-Comparatives -

Home - AV-Comparatives

AV-TEST -

Test antivirus software for Windows 10 - August 2020 | AV-TEST

Virus Bulletin VB100 -

Virus Bulletin :: Comparative Test Dates

SE Labs -

SE Labs