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Kudos0

Is it normal for scan time to suddenly decrease?

So this weekend my scan time suddenly decreased.from one hour thirty minutes to twenty five minutes.  I did not uninstall any files or anything.  Despite this decrease in scan time, the number of trusted and skipped files in each scan decreased from to 36000 and 24000 100 and 10 respectively.  Additionally, a second scan before a database update has not changed the amount of time it takes to complete but the number of skipped files has drastically decreased from 405000 to 53000.

Was there an update that I was not aware of or are some Norton files corrupted?

Replies

Kudos0

Re: Is it normal for scan time to suddenly decrease?

Hi, aarogree. This is normal. If you run a Norton Insight scan, it will scan all running processes.

If you then use the drop down option of ALL files and let it scan,  your scan times will be considerably decreased, as Norton will then only scan new or changed files.

Hope that helps.

Windows 10 Home X 64
Kudos0

Re: Is it normal for scan time to suddenly decrease?

It is normal for full scans to take over an hour for one year with very little variation in the whole "takes an hour and a half to complete a full scan" thing and then suddenly one day have a full scan that scans the same number of files take a third of that time?

Kudos0

Re: Is it normal for scan time to suddenly decrease?

Scans are done using a combination of downloaded definitions and the latest cloud definitions, so times will always vary.

If you follow my suggestion in my previous post, times will definitely decrease.

Windows 10 Home X 64
Kudos0

Re: Is it normal for scan time to suddenly decrease?

Ok, I did, but just what do you think could cause this particular situation.  What change could occur that would cause a scan that always took the same amount of time unless it was done before definitions were updated even if it was done two days in a row to suddenly have a sharp decrease in scan time?

For one reason or another, the downloaded definitions and cloud definitions never changed the amount of time it took to scan in the past, but now they are.  That's what's confusing me, the fact that regardless of how these scans are supposed to function, they never had any impact on the scan time and what files are trusted and skipped.  But now they are, resulting in simultaneously fewer trusted/skipped files but also shorter scan times.  I never did the scan insight until after you suggested it, but you only suggested it after I mentioned that the scan times were shortening for some reason.

Kudos0

Re: Is it normal for scan time to suddenly decrease?

Are you running the latest version ? For me with Norton Security, it's V 22.6.0.142.

If so, that may account for the differences. If you're not happy with what's happening, you can always use the Norton Remove and Reinstall Tool, which will give you a clean install. http://www.norton.com/nrnr

If used, please read the Before you begin note and run Live Update after until no more are found, and then reboot.

Let us know how you go.

Windows 10 Home X 64
Kudos0

Re: Is it normal for scan time to suddenly decrease?

I'm apparently running version 22.5.5.15.

I'm not unhappy, just extremely paranoid.  I've had bad experiences with viruses sneaking past antivirus software on past computers.

Kudos0

Re: Is it normal for scan time to suddenly decrease?

You need to run Live Update manually to get to V 22.6. It's being progressively rolled out, so you may be in a region that hasn't got it yet.

https://community.norton.com/en/forums/norton-226-product-update-availab...

As I said, if you have any concerns run the NRRT, as it will give you a clean install in the event yours is corrupted in any way.

Either way it won't hurt, and you'll know you have a fresh working version.

If it's any help, I've been running Norton for many years and I have never been infected.

Wise computer practices and keeping Norton up to date will protect you. Check this thread out.

https://community.norton.com/en/forums/how-i-stay-safe-online

Windows 10 Home X 64
Kudos0

Re: Is it normal for scan time to suddenly decrease?

Well, this is odd. I ran the scan again today and it's back to an hour and a half total scan time. All I did prior to the scan was run the scan insight; I didn't update it to V 22.6 so nothing should be different aside from the virus definitions, but it's back to the same long scan time. Now I'm really confused since I was about to accept that I just received an upgrade to Norton that decreased the scan time, but now I have no idea what's going on.

Kudos0

Re: Is it normal for scan time to suddenly decrease?

Hello

Hope you don't mind the interruption. How often are you doing these full system scans? If you are doing them like every day, Norton will then only scan the files that are new, have changed since the last scan. Over the weekends, there are less downloads. Within the last few days, there was a SONAR download which might have affected your files in that it caused changes and therefore  would be scanned and would increase the number of files to be scanned. Now, the windows updates have come out. When you install them, they will change scan times also.

You could also check the condition of your hard drives. Perhaps there are some bad sectors which might cause some files to not get scanned.

Thanks.

Success always occurs in private and failure in full view. Windows 10 Pro 64 bit Norton Core Security Plus 22.17.3.50 Core Firmware 282 I E 11 Chrome latest version.
Kudos0

Re: Is it normal for scan time to suddenly decrease?

It varies. Sometimes once a week, sometimes more if I suspect something is going on. I have scanned "every day" in the past, but it never really changed the amount of time it took to scan. Also I used the check disk function already. It said that there are no errors.
Kudos0

Re: Is it normal for scan time to suddenly decrease?

Have you done a reinstall ?

Windows 10 Home X 64
Kudos0

Re: Is it normal for scan time to suddenly decrease?

No, but it has gone back to the normal amount of time.
Kudos0

Re: Is it normal for scan time to suddenly decrease?

Hello

It should decrease in time length a little bit each week unless you download a lot of files. Running the Norton Insight Scan every day will cut down on the scan time also.

Thanks.

Success always occurs in private and failure in full view. Windows 10 Pro 64 bit Norton Core Security Plus 22.17.3.50 Core Firmware 282 I E 11 Chrome latest version.
Kudos0

Re: Is it normal for scan time to suddenly decrease?

I always thought the number of skipped and trusted files would increase as the scan time decreased?

Did you happen to make any other changes like disabling compressed file scans?

Dave

Kudos0

Re: Is it normal for scan time to suddenly decrease?

The only significant changes I have made lately is upgrade to Windows 10, and that seems to have seriously increased the scan time. But that's to be expected, right?
Kudos1 Stats

Re: Is it normal for scan time to suddenly decrease?

aarogree:
The only significant changes I have made lately is upgrade to Windows 10, and that seems to have seriously increased the scan time. But that's to be expected, right?

Yes, when you upgrade to Windows 10, Windows creates a very large Windows.old folder with contents from the old operating system which allows you to revert back to the previous system if you decide not to keep Windows 10.  This will increase the scan time appreciably, as Norton scans those files.  Windows 10 automatically removes the Windows.old folder after 30 days.  If it has been longer than a month since you installed Windows 10, the removal of the Windows.old folder could account for a sudden, significant decrease in your scan time - first, the Windows.old folder will no longer be present and, second, the new Windows 10 installation will presumably have fewer Windows updates and associated files to scan than the previous OS had accumulated over the years.

Kudos0

Re: Is it normal for scan time to suddenly decrease?

No, I mean I just updated it, as in on Friday, after I asked the question.

Kudos0

Re: Is it normal for scan time to suddenly decrease?

Then your full system scans will probably be longer than usual for the next month.

Kudos0

Re: Is it normal for scan time to suddenly decrease?

And what about Norton Power Eraser?  It doesn't seem to be working with my Windows 10; it gets to a certain point and then sticks on "canceling scan" despite the fact that I didn't cancel it.

Kudos0

Re: Is it normal for scan time to suddenly decrease?

Why are you using Power Eraser ?  Do you think you are infected ? It's an aggressive tool, which should only be used as a last resort. This is from the Norton page.

Because Norton Power Eraser uses aggressive methods to detect threats, there is a risk that it can select some legitimate programs for removal. If you accidently remove a legitimate program, you can run Norton Power Eraser to review past repair sessions and undo them. End quote

Sometimes Norton is best left to run by itself, and not to keep stressing over what is usually normal events.

Windows 10 Home X 64
Kudos0

Re: Is it normal for scan time to suddenly decrease?

I use it whenever I suspect there's something on my computer that my scans aren't picking up. I don't press the fix button all willy-nilly; if what it shows are things that I know aren't viruses (e.g. desktop shortcuts to The Witcher Adventure Game or Shadow Warrior 2013) then I just exit and conclude that there are no viruses on my computer that regular norton scans can't detect.
Kudos0

Re: Is it normal for scan time to suddenly decrease?

Hello

As F 4E has said it is very aggressive and shouldn't be used because you think you might have some malware. It should only be used under the supervision of an expert malware removal person. You can run it to reverse what it removed. BUT, you can't do that if it removed some vital piece of the O/S.

If you think you might be infected, you are better off going to one of the free malware removal sites that we can recommend to you. They can help you to check out your computer more thoroughly to see if  you have malware.

Thanks.

Success always occurs in private and failure in full view. Windows 10 Pro 64 bit Norton Core Security Plus 22.17.3.50 Core Firmware 282 I E 11 Chrome latest version.
Kudos1 Stats

Re: Is it normal for scan time to suddenly decrease?

It never thinks a vital piece of the O/S is a virus. The worst it ever does is think that the desktop shortcut to a game is a virus, and even then I don't let NPE remove it.

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