Failed to install KB2267602 (Version 1.447.17.0)

Question

This update is failing to install.

I believe the problem is lack of disk memory.

How much do I need ? It's not telling me.

Answer 1

Hi Stirrick,

Thanks for posting.

Just to clarify, KB2267602 is a Microsoft Defender Antivirus security intelligence (definition) update, not a full Windows feature or quality update. These updates are typically very small and are downloaded frequently to keep protection up to date.

Regarding disk space:

• Microsoft does not publish a specific disk‑space requirement for Defender definition updates.
• In general, they only require a small amount of free space (usually tens of MB), so a moderate amount of available storage is sufficient unless the system drive is nearly full.

Since disk space is usually not the cause, you can try the following:

1. Make sure you have at least 1–2 GB of free space available on the system drive (this covers temporary files and update staging).
2. Restart Windows and then open “Windows Security” > “Virus & threat protection” > “Protection updates” > “Check for updates” to retry the definition update manually.
3. If the failure only happened once, you can wait for the next daily Defender definition update, as each release replaces the previous one.
4. If the update has been failing across multiple days, run “Check for updates” again in “Settings” > “Windows Update” to ensure the Windows Update service itself is working correctly.

For reference, see Defender security intelligence updates.

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Answer 2

Thanks for the replies, guys.

I got this update away, but it's not ideal.

I was in the middle of some important work related stuff when I had to divert to look into this problem. Not only was I getting an install failed message (no reason given) but suddenly I was being blocked from opening WORD documents. So I was basically screwed until I got to the bottom of the issue.

Which is really my main gripe - the lack of transparency on just about everything. I get a degraded PC performance - mine is not the most recent design - and when I restart to clear things out, I'm told that a download is in progress. Downloading what ? For which application ?

How do I get an update on which applications are being updated ?

In this case I cleared a few things off my C:/ Drive and the installation went through. And the WORD problem (I assume it was a lack of memory) went away when I took this unwanted 'co-pilot' off my task bar. Was that the problem ? No idea.

Anyway, I'm nice and calm now, but on Thursday I was at the 'throw this bloody thing out the window' stage. It really shouldn't be like that. I'm not PC illiterate. I'm pretty switched on about most things. I shouldn't really need to conduct a fault-finding exercise with little to go on to find out why my PC is being slugged.

Thanks again for taking the time to reply. ;-)

Answer 3

KB2267602 is not a Windows update, it is just a virus definition update for Defender, that is a very small update, usually less than 20MB in size, so unless your drive is actually full, then disk space is not causing that to fail.

Usually there is a new version of KB2267602 released most days to ensure Defender contains all the latest virus definitions, how long has that update been failing, is it just todays virus definition update that is failing.