Author Topic: Avast Free - Quick Scan Cancels @ 99%, Full Scan Not Working  (Read 12197 times)

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Offline marianne.iaquinto

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Avast Free - Quick Scan Cancels @ 99%, Full Scan Not Working
« on: April 01, 2017, 02:34:59 PM »
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!

Offline Para-Noid

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Re: Avast Free - Quick Scan Cancels @ 99%, Full Scan Not Working
« Reply #1 on: April 01, 2017, 02:40:44 PM »
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).
Dell Inspiron, Win10x64--HP Envy Win10x64--Both systems Avast Free v17.9.2322, Comodo Firewall v8.2 w/D+, MalwareBytes v3.0, OpenDNS, Super Anti-Spyware, Spyware Blaster, MCShield, Unchecky, Vivaldi Browser and, various browser security tools.

"Look before you leap!" Use online scanners before you click on any link.

Offline dlp69

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Re: Avast Free - Quick Scan Cancels @ 99%, Full Scan Not Working
« Reply #2 on: April 01, 2017, 10:51:10 PM »
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. 
« Last Edit: April 01, 2017, 11:35:18 PM by dprout69 »

Offline Para-Noid

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Re: Avast Free - Quick Scan Cancels @ 99%, Full Scan Not Working
« Reply #3 on: April 01, 2017, 11:52:45 PM »
I don't have those issues.
Have you tried a repair as outlined in reply #1?
Dell Inspiron, Win10x64--HP Envy Win10x64--Both systems Avast Free v17.9.2322, Comodo Firewall v8.2 w/D+, MalwareBytes v3.0, OpenDNS, Super Anti-Spyware, Spyware Blaster, MCShield, Unchecky, Vivaldi Browser and, various browser security tools.

"Look before you leap!" Use online scanners before you click on any link.

Offline dlp69

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Re: Avast Free - Quick Scan Cancels @ 99%, Full Scan Not Working
« Reply #4 on: April 02, 2017, 12:44:12 AM »
Tried a repair... additionally this is on two computers in my case.

Offline GraceFull

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Re: Avast Free - Quick Scan Cancels @ 99%, Full Scan Not Working
« Reply #5 on: April 02, 2017, 07:20:39 AM »
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. 

Offline Asyn

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Re: Avast Free - Quick Scan Cancels @ 99%, Full Scan Not Working
« Reply #6 on: April 02, 2017, 03:30:28 PM »
Known bug, devs are working on it.
Win 8.1 [x64] - Avast PremSec 21.6.6435.IBC [UI.655] - EEK - Firefox ESR 78.12 [NS/uBO/PB] - TB 78.12
Avast-Tools: Secure Browser 92.0 - Cleanup 21.2 - SecureLine 5.12 - Driver Updater 21.2 - CCleaner 5.83
Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0

Offline pearliesloot

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Re: Avast Free - Quick Scan Cancels @ 99%, Full Scan Not Working
« Reply #7 on: April 02, 2017, 07:38:20 PM »
avast internet security
Program version: 17.3.2291

quick scan and full scan cancel at 99%

is there a fix yet?


Offline Asyn

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Re: Avast Free - Quick Scan Cancels @ 99%, Full Scan Not Working
« Reply #8 on: April 02, 2017, 07:48:16 PM »
In fact is does complete - it's just a GUI bug.
Win 8.1 [x64] - Avast PremSec 21.6.6435.IBC [UI.655] - EEK - Firefox ESR 78.12 [NS/uBO/PB] - TB 78.12
Avast-Tools: Secure Browser 92.0 - Cleanup 21.2 - SecureLine 5.12 - Driver Updater 21.2 - CCleaner 5.83
Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0

Offline Gopher John

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Re: Avast Free - Quick Scan Cancels @ 99%, Full Scan Not Working
« Reply #9 on: April 02, 2017, 08:38:31 PM »
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.
AMD A6-5350M APU with Radeon HD Graphics, 8.0GB RAM, Win7 Pro SP1 64bit, IE11
i7-3610QM 2.3GHZ, 8.0GB Ram,  Nvidia GeForce GT 630M 2GB, Win7 Pro SP1 64bit, IE 11
Common to both: Avast Premium Security 19.7.2388, WinPatrol Plus, SpywareBlaster 5.5, Opera 12.18, Firefox 68.0.2, MBam Free, CCleaner

Offline bluesgene

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Re: Avast Free - Quick Scan Cancels @ 99%, Full Scan Not Working
« Reply #10 on: April 13, 2017, 05:41:28 PM »
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.

Offline UpUpnHeaHea

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Re: Avast Free - Quick Scan Cancels @ 99%, Full Scan Not Working
« Reply #11 on: April 24, 2017, 03:43:05 PM »
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

Offline pspinks

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Re: Avast Free - Quick Scan Cancels @ 99%, Full Scan Not Working
« Reply #12 on: April 26, 2017, 02:45:21 PM »
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.

Offline dknauer

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Re: Avast Free - Quick Scan Cancels @ 99%, Full Scan Not Working
« Reply #13 on: April 30, 2017, 05:41:18 PM »
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.

 8)

Offline DavidR

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Re: Avast Free - Quick Scan Cancels @ 99%, Full Scan Not Working
« Reply #14 on: April 30, 2017, 05:54:00 PM »
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.
Windows 10 Home 64bit/ Acer Aspire F15/ Intel Core i5 7200U 2.5GHz, 8GB DDR4 memory, 256GB SSD, 1TB HDD/ avast! free 21.5.2470 (build 21.5.6354.675) UI 1.0.646/ Firefox, uBlock Origin, uMatrix/ MailWasher Pro/ Avast! Mobile Security