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The Windows operating system is known for its frequent updates.
This frequency of updates has even increased further with the launch of Windows 11.
Every major Windows update comes with several bugs and glitches.
The same happened with Windows 11.
There can be several things that may be causing this error.
Since the error code doesnt mention why this error occurred, troubleshooting it becomes a task.
However, in most occurrences, it has been seen that this error occurs due to driver-related issues.
So, without any further ado, lets get started!
What is Windows Update Error Code 0xC1900101?
Many people think this error occurs exclusively for Windows 11 users, but thats not the case.
Besides that, Id like to mention that this isnt any specific error code.
What Causes Windows Update Error Code 0xC1900101?
As mentioned above, the glitch notice doesnt clearly explain the underlying reason for triggering this error for you.
Antivirus tools are notoriously famous for giving false threat detection messages.
This happens primarily because most signature-based and anomaly-based antivirus software follows a definition-based approach for identifying threats.
Since youre updating your Windows, youre making several system-level changes.
Besides that, it is also possible that the OS update files havent been downloaded properly.
In both scenarios, these file-related issues could lead to installation failure and potentially show the error code 0xC1900101.
your system downloads the OS upgrade installation files over the internet.
If your internet connection isnt stable, it may hinder downloading files.
As a result, this error may occur.
Windows 11 requires at least 64 GB of storage for proper installation.
Besides that, for Windows 10, you need at least 16 GB of storage space.
An outdated BIOS starts affecting system functionalities and causes errors that primarily show BSOD.
How to Fix Error Code 0xC1900101?
Since the fault signal doesnt explain what triggers this error, troubleshooting becomes challenging.
Youll have to go for the hit-and-try method.
Besides that, you also need around 20 GB of free space to download upgrade files.
It is a very lightweight version of Windows 11 with no strict hardware requirements.
Remove All External Devices
When upgrading your Windows OS, you should remove all non-essential external devices.
Just keep the keyboard, mouse, and other essential devices attached.
After removing external devices, reset your system and check whether the error still persists.
Therefore, updating drivers or uninstalling problematic ones should be your topmost approach to fixing this problem.
Once youve updated/uninstalled all the problematic drivers, kickstart your PC and see if the error has been fixed.
If the error persists, you should update all the disk drivers installed on your machine.
The manual method is free but takes time and requires some basic computer skills.
Alternatively, if you want to update the drivers automatically, Id recommend using DriverFix.
I recommend DriverFix because Ive used this tool, and its ease of use has impressed me greatly.
you might simply go for the Update all option and take a coffee break.
In the meantime, this tool will update all the drivers.
Updating all the drivers to the latest version should mostly fix the error.
In case it doesnt, you might follow the next workaround.
Note that DriverFix isnt the only tool it’s possible for you to use to update drivers automatically.
There are several otherdriver updatersthat can do the same job.
This will help you identify the exact reason that couldve triggered this error and also help you fix it.
it’s possible for you to choose the Fix problemsoption to fix the error.
And you better try the next workaround to fix them.
This is because Clean Boot mode basically boots your Windows machine with only essential drivers and programs.
trigger the SFC Scan
System files play a crucial role in the functioning of the operating system.
reset your system in both scenarios and verify if the error code 0xC1900101 persists.
If yes, try the next workaround.
Sometimes, antivirus software prohibits users from upgrading their OS and causes errors like 0xC1900101.
Disabling the antivirus could be an option, but the registry entries created by the antivirus programs remain active.
Therefore, uninstalling your antivirus would be the sure-shot solution you have to fix this error.
Here is how you could remove your antivirus
Once youve uninstalled the antivirus, start your PC.
After that, execute the Windows upgrade process, and peek if the error has been fixed.
If thats the case, you should uninstall these programs before attempting to upgrade your Windows OS.
If the error persists, try following the next workaround.
Update BIOS
Another reason this error 0xC1900101 occurs is because of outdated BIOS.
People often dont care about updating BIOS because it requires technical knowledge and doesnt directly affect performance.
Even many manufacturers recommend not updating BIOS if your gear is working fine.
However, an outdated BIOS may lead to hardware and compatibility-related bugs.
And the updated BIOS can enable additional features and provide stability and enhanced security.
Besides that, the method to update BIOS varies significantly from manufacturer to manufacturer.
Therefore, Id recommend you check yourmotherboardmanual before updating BIOS.
you’re free to also seek help from any computer expert who can help you with the same.
Thankfully, Windows 10 can reset the PC without losing any personal files.
It is a great option to reset all the tweaks to default.
Here is how you’re able to reset your PC:
The reset process will initiate shortly.
It would take a couple of minutes, depending on your chosen option.
Once your PC resets, you’ve got the option to upgrade your Windows OS very easily.
This time you will not see any error code.
Besides that, this error prevents you from installing the latest updates on your Windows machine.
Therefore, troubleshooting this error becomes an essential task.
Next, check out things to take care of while youupdate the BIOS.
