0x800f0805

I really appreciate your patience and the details you've shared. I've done my best to assist, but I have to be honest I’ll need to refer you to another support executive who’s better equipped to assist further.

Thank you for your understanding—appreciate your patience.

Regards

Udit

Hello theworstmaneverbtw,

Thank you so much for reaching out, I am Udit and I am glad to assist you today.

I would like to tell you that, error 0x800f0805 usually means the update or feature doesn’t match your system, or something went wrong with the update process itself.

Since you’ve already tried a few things, here are some clear and effective steps to help you move forward:

1. Try the Windows Update Troubleshooter This is the simplest first step and can catch common issues quickly.

Go to Settings > System > Troubleshoot > Other troubleshooters

Find Windows Update and click Run

Let it scan and apply any fixes it suggests, then restart your PC

It may not solve deeper issues, but it's worth trying before moving on.

2. Repair Windows with built-in tools If system files are damaged, these commands can restore them.

Open Command Prompt as Administrator and run these one by one:

DISM /Online /Cleanup-Image /RestoreHealth

sfc /scannow

They can take a while, but once done, restart your computer and try the update again.

3. Installing a feature like .NET Framework 3.5? If the error came up while enabling optional features, try this in PowerShell (run as administrator):

Enable-WindowsOptionalFeature -Online -FeatureName NetFx3 -All

If that fails, and you have a Windows ISO mounted, run:

DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /Source:D:\sources\sxs /LimitAccess

Make sure to replace D: with the correct drive letter for your ISO.

4. Sometimes old or broken update files block new installations.

In Command Prompt (as administrator), run these commands:

net stop wuauserv

net stop bits

ren C:\Windows\SoftwareDistribution SoftwareDistribution.old

net start wuauserv

net start bits

Then try checking for updates again.

5. Check compatibility of the update or feature If you’re using a downloaded update file (.msu or .cab), confirm it’s right for your version of Windows. To find your version, press Windows + R, type winver, and hit Enter. Then compare that to the update requirements.

If this still doesn't work, feel free to share what exactly you were trying to install, and I’ll help you figure out the correct file or method.

Regards

Udit

I tried to install this update:

But there is one problem:

(An offline Windows update installer.

The update is unacceptable to your computer)

Thanks for the update.

That error message about missing Windows security updates usually means your system is either a bit behind on updates, or something under the hood isn’t working quite right.

Let’s take a few calm, focused steps to try and fix this in a way that actually works.

1. First, just check your Windows version Press the Windows key + R, type winver, and hit Enter. A little window will pop up with something like “Windows 10 Version 22H2” or “Windows 11 Version 23H2.” Let me know what it says - FACEIT needs the latest security updates, and sometimes even one missing update can block it.
2. Try installing the update manually Go to the Microsoft Update Catalog online (just Google it), and search for the latest update for your version — for example, “April 2024 cumulative update for Windows 10 22H2.” Download the one that fits your system, install it, and restart your computer afterward.
3. Check if some security features are turned off FACEIT needs a few things running in the background. Here’s how to check:

Press Windows + R, type services.msc, and hit Enter

In the list, scroll down and look for “Windows Update” and “Windows Defender Antivirus Service”

Make sure both say “Running” and are set to start automatically

If either one is stopped or disabled, that could be the reason FACEIT is blocking the install.

Hope it will work, let me know how it goes.

Regards

Udit

Hello, thanks for your answer. I tried to do all things that you wrote, but nothing had changed. I'm trying to install faceit AC. It provides this error: your system is missing important windows security updates.