[2015.10.3.2223] Avast prevents chkdsk to run

[REDACTED]

I've had this problem too on a 64 bit Windows 7 machine. I've suffered a few BSODs recently (itself unusual) and tried running chkdsk on restarts but they failed (or rather autochk wasn't allowed to run). I was also finding the NgBase snapshot .dat file was growing larger and larger by the day and it wouldn't allow me to defragment it either. When the snapshot file got to 1.4GB I decided that I'd had enough of the Ng/Virtual Machine feature and uninstalled it after advice from this forum (by using Control Panel, then selecting 'Change' for Avast in 'Programs and Features' and deselecting 'Secure Virtual Machine'). I can now run chkdsk.

Thanks for the tip 

[REDACTED]

I agree with all of the above. Win 7 Pro, 64 bit. I tried turning off Shields to reboot and run chkdsk. Did't work. Then I tried safe mode. Didn't worlk, so I finally uninstalled Avast Internet security and it rand fine. After reboot, chkdsk ran fine. Then I re-installed paid Avast IS. That's a pain. So now I am going to try the elimination of the Virtual setting. But Avast really should react and fix the problem, as this only started after the latest update. Do they read these notes on their own forum?
So far, it doesn't look like it.
By the way, the security letters required to post these are barely legible.!

[REDACTED]

This problem has appeared since version 2223, i contacted technical support to report their, they said they were going to investigate. 

[REDACTED]

Okay I tried check disk on my win 7 64 bit system with avast version 10.3.2223 and it would not run. I did an avast clean install to version 10.3.2218 and now check disk works.

I was going to do win10 update but now I feel I must wait till avast is truly fixed.

[mchain]

Aysn provided this link:  https://forum.avast.com/index.php?topic=174286.msg1240137#msg1240137

[bob3160]

Okay I tried check disk on my win 7 64 bit system with avast version 10.3.2223 and it would not run. I did an avast clean install to version 10.3.2218 and now check disk works.

I was going to do win10 update but now I feel I must wait till avast is truly fixed.

Avast 10.3.2225 and Windows 10 are working without problems on my computers.
There's no reason to wait to do your upgrades.

[REDACTED]

I too have had the problem of chkdsk not running with AVAST. After uninstalling AVAST chkdsk runs no problem.
I hope they find a fix soon as I am running my computer without virus protection.

[REDACTED]

@douggate Even with 10.3.2225?

[DavidR]

I too have had the problem of chkdsk not running with AVAST. After uninstalling AVAST chkdsk runs no problem.
I hope they find a fix soon as I am running my computer without virus protection.

That is worse than the fact you couldn't run chkdsk on what should be the rare occasion that you might need it. I can't recall the last time I ever needed to use chkdsk and I'm talking many years.

Having no protection is far serious than the possibility of having a windows file that is possibly corrupt and could be recovered by the chkdsk process.

As has been suggested ensure that you are using the latest build 10.3.2225.