Avast Free - Quick Scan Cancels @ 99%, Full Scan Not Working

[REDACTED]

Program version: 17.3.2291 (build 17.3.3443.0)
Virus definitions version: 170331-1

When quick scan runs, it gets to 99%, then says quick scan canceled.

Just tried to run a full scan, it went to 3% after about 20 minutes, then back to 2% then disappeared and the scan stopped.

The program was just updated yesterday evening, so I believe I have the latest.  Please help!  Thanks!

[Para-Noid]

This has been by another user. Try a repair...Control Panel>Programs and Features>double click "avast">click "repair">reboot.
Does this happen with a full system scan? Keep in mind when running a full scan the progress indicator will remain at 0% for quite awhile (this is normal).

[REDACTED]

No, it's all jacked up in the latest version.  Full scan, quick scan doesn't matter.

> The pop up scan status gives the chime like it finished scanning
> The pop up scan status stays on screen and shows 99% scan canceled.
> You go into scan history and it says the report completed.

This is now completely broken. 

[Para-Noid]

I don't have those issues.
Have you tried a repair as outlined in reply #1?

[REDACTED]

Tried a repair... additionally this is on two computers in my case.

[REDACTED]

Since updating Avast Premier a couple of days ago to version 17.3.2290 (build 17.3.3442.0), my daily scheduled Full Virus Scan "says" that it cancels at 99% - HOWEVER, when checking Scan History, the Full Virus Scan is listed as completed and provides the details. 

[Asyn]

Known bug, devs are working on it.

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avast internet security
Program version: 17.3.2291

quick scan and full scan cancel at 99%

is there a fix yet?

[Asyn]

In fact is does complete - it's just a GUI bug.

[Gopher John]

I have Avast Internet Security on 3 Win 7 Pro SP1 64 bit laptops, and haven't experienced any cancellation of scans.  They complete normally.

[REDACTED]

Also having this problem with 3 separate computers (Lenovo laptop, Dell desktop, Lenovo desktop) running Windows 10. In addition to the results message (of 99%), clicking on "Details" doesn't go to details, but instantly starts scanning again from 0%. Now all this might just be an annoyance except in the case of 1 of the computers, which I don't use often, is set to auto shut down after scan. But with this bug, no auto shut down.

[UpUpnHeaHea]

I checked sounds before the scan and the box for scan complete was not checked. I checked the box and when scan finished it closed the window and I did not see the scan canceled box. Try it and see if you have the same results

[REDACTED]

Program version: 17.3.2291
Build: 17.3.3443.0
Virus definitions: 170425-2
Platform: Windows 10

(Values correct when email drafted today. Conceivably I was on slightly earlier versions when starting the problematic scan yesterday).

These problems are still unfixed. Surprising, as I read above that they were known problems at the beginning of the month.

I started a full scan yesterday. It stayed on 0% for several HOURS, so I left it running overnight (I have a lot of disks).
In the morning it had finished with a message saying that the scan had been cancelled at 98% complete.
Having said that, the results appeared to be complete.

These bugs aren't just a minor irritation for experienced users. Try putting yourself in the shoes of an inexperienced user who is worried s/he has just been infected. S/he starts a scan and nothing happens (ie, progress stays at 0% for ages), so s/he worries that the infection is preventing the anti-virus software from running. Then s/he sees a message that the scan has been cancelled - s/he didn't cancel it, so the infection must be to blame. And what do you do if an infection has bettered your anti-virus software? - you switch to another vendor's product.

Avast developers... in my opinion leaving glaring bugs like this unfixed for weeks will cause you reputational damage, so I suggest you fix them pronto.

[Dan The Man]

I have been having this problem too for a few months.  I schedule a full scan to run very early every Sunday morning.  It should be completed by the time I get up, but often doesn't seem to have run yet.  When I check later in the morning, I get the Scan Failed - 99% message.  If you click on Details, another full scan immediately starts.  What's up here?

Related to this is that, after this full scan has run, the computer will not restart correctly - either manually or as part of an application update.  It gets partway, then just locks up.  I need to do a hard power-down, then restart.  Once this has been done, the computer will restart correctly when invoked.

 

[DavidR]

I have been having this problem too for a few months.  I schedule a full scan to run very early every Sunday morning.  It should be completed by the time I get up, but often doesn't seem to have run yet.  When I check later in the morning, I get the Scan Failed - 99% message. 

If you click on Details, another full scan immediately starts.  What's up here?

<snip>

Both of these are acknowledged bugs, yet to be squashed in the current versions 17.3.2291.

Also see https://forum.avast.com/index.php?topic=201589.0.