Windows 10: Windows Defender Out of Date & Won't Update after Windows 10 Upgrade

I've been using Windows Defender -- updating and scanning fairly regularly since last February. After upgrading to Windows 10 yesterday, Defender showed up as out of date -- last updated in July. When I tried to update it from the Desktop App, it repeatedly failed. When I tried to update it from Windows Updates, none of the updates (including Windows Defender) would download. After rebooting and trying again-- more than once --most of the updates did download, but not Windows Defender and also an HP Update. Finally, after rebooting and trying again, they began to download, but did so slowly and seemed get stuck (e.g. at 50%). After continuing to reboot and restart the update, the percentage of the download at which it would seem to "stick" continued to rise (75% 83% 90%) until finally-- after rebooting and restarting the update several time --I managed to complete the download of the update and install it successfully. I am running a scan as I type this and the desktop app show windows defender as fully updated. Not sure what all this means, but none of the other help threads that I found via google directly addressed my problem so I wanted to document this for anyone else who is having similar problems.

:)

 

Windows 10 Defender has stopped updating in Windows update.

Hello,

Installed WIn 10 on an ASUS Eee as an upgrade to Win 7 starter. Cloned the HDD to an SSD and upgraded that. Needed a few restarts and seems to be fairly stable but it has "crashed" on startup after installing programs or updates twice.

BUT now running OK and has completed several win 10 updates OK. It also initially (up to 26th Aug) updated Defender at the same time. It now however won't install definition updates via Windows update. It will allow manual definition updates (via exe file
downloads from MS site) and Windows update recognises the Defender is up to date.

If I run the update from within Defender after I have manually updated the definitions then Defender checks and says up to date. If defender is not up to date, it checks for new defs, downloads them but won't install them - comes up with "cant install error".

"Definition Update for Windows Defender - KB2267602 (Definition 1.205.939.0) - Error 0x80070003"

Any solution please. All ran OK for a few days so some bug has got in there somewhere!

Thanks, Mel

 

windows defender is not updating the virus and spyware definations

Hi Steven,

Thanks for getting back about this problem.

I upgraded from Windows 7 Professional to Windows 10 Professional.

Using Windows Defender before and after the upgrade.

I don't think any other antivirus has ever been installed on this PC.

I tried rebooting.

I checked the time and date - they are on automatic sync to Microsoft

I ran the trouble shooter, (both options) it said it made changes to the registry, but this hasn't made any difference, even after rebooting the updates still won't install?

The updates that won't install are:

• Definition Update for Windows Defender - KB2267602 (Definition 1.207.891.0).

• Windows Malicious Software Removal Tool for Windows 8, 8.1, 10 and Windows Server 2012, 2012 R2 x64 Edition - September 2015 (KB890830).

• Update for Microsoft Visual Studio 2010 Tools for Office Runtime (KB3001652).

 

It's taking a while for the updates lately. Sometimes they go at normal speed, other times it takes time. My last update took over 1/2 hr to d/l, coming in small segments like you described, whereas the one before that took about 5 mins. Just give it time when it seems to "hang up," let it continue.

Might want to run an SFC to see if all is well with your OS.

SFC Command - Run in Windows 10 - Windows 10 Forums

 

Thanks--I was able to update the definitions from the desktop app this morning (very quickly--no hangups). Also, whereas my initial "full scan" -- i.e. the first one after the upgrade -- went very slowly (took a few hours), the one that I am running this morning (just as an experiment) seems to be going much faster (already a 1/3 of the way through after just 15 minutes). All is well as far as I can tell...

Those instructions are a bit complicated (and the command prompt says I need to be an admin running a console session or something to that effect). Is there a simple "for dummies" way of doing this -- at least a provisional first step -- that might reveal some possible problems? Thanks again...

 

No problem, scroll down to Option Three on the tutorial & follow the instructions. You launch an elevated command prompt & type sfc /scannow. Allow it to run, it could take a while. Run it 3 times if it finds anything wrong. Here is a tutorial for launching an elevated command prompt.

Elevated Command Prompt - Open in Windows 10 - Windows 10 Forums

After that, if you want to view the log scroll down to Option Five, copy & paste the code to view it.

Yeah, the slow update thing started with the release of 10, & I was wondering for a while WTF was going on with the updates myself. Did some investigating also & thought it was something on the OS. Started to see after 3 or 4 updates it was a crap shoot whether you got them slow or at normal speed. *Rolleyes

 

Thanks again -- all is well, or so it appears: