quick scan vs deep scan/full scan ( antivirus )

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neofan3

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Almost every time I do quick scan and got nothing and I think it is good. However, I just read online, it says that when quick scan does not find anything then you do deep scan. It confuses me, since it means I should do deep scan all the time. ?
 

Macboatmaster

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the 1000$ question is
which anti-virus
ON windows defender and malwarebytes and many others only a quick scan is necessary
The converse of what you have read is usually the case eg. You do a quick scan and only if that finds something should you then need to follow it with a full scan
For instance a threat scan on Malwarebytes paid for edition or the scan on the free version will scan up to 99% of the system
A full scan also scans the system restore points and other unusual places to detect, or at least try to detect, all possible traces of infection.


As I said it depends on the AV and to some extent the OS which I presume is not Windows 2000 as indeed commented on by my colleague Cookiegal in another of your topics
Also, it appears you're running Windows 7 and if you don't still have your Windows 2000 computer you should visit your profile and change that information so that it's current which makes it easier to help you in some cases
 
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neofan3

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microsoft security essentials in windows 7 64bit.
I use malwarebytes home premium. The recommended scan is thread scan which is equivalent to deep scan. The other option is hyperscan equivalent to quick scan. Thread scan takes about 12 minutes which isn't too long.

The converse of what you have read is usually the case eg. You do a quick scan and only if that finds something should you then need to follow it with a full scan
That is what I think. But in case a quick scan finds nothing. how many % chance a deep scan will find something ?
 

neofan3

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the custom scan is configured as the full scan
in my MBAM home premium, custom scan is defined as "scan where and what you want to scan".
 

Macboatmaster

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With respect your question was

However, I just read online, it says that when quick scan does not find anything then you do deep scan. It confuses me, since it means I should do deep scan all the time. ?

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The answer is as I posted generally NO
The converse is true

I fail to understand what exactly it is that you are wanting advice on
I suspect you have detected a problem on your system
If so please explain what the problem is - as at the moment we are starting to go round in circles




Threat Scan

This method of scanning detects a large majority of threats that your computer may be faced with. Areas and methods tested include:
  • Memory Objects: Memory which has been allocated by operating system processes, drivers, and other applications.
  • Startup Objects: Executable files and/or modifications which will be initiated at computer startup.
  • Registry Objects: Configuration changes which may have been made to the Windows registry.
  • Filesystem Objects: Files stored on your computer's local disk drives which may contain malicious programs or code snippets.
  • Heuristic Analysis: Analysis methods which we employ in the previously-mentioned objects — as well as in other areas — which are instrumental in detection of and protection against threats, as well as the ability to assure that the threats cannot reassemble themselves.
Whereas a custom scan can be configured to scan ALL of a drive or indeed ALL mounted drives
It should not be used as routine nor as scheduled BUT may be used if the threat scan finds something - that raises a concern - that a further check is required.
https://forums.malwarebytes.org/ind...e-custom-and-other-scans-go/?hl=+custom++scan
 
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neofan3

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My original post question is dealing with antivirus and not malware. But from the opinion of some malware experts threat scan is normally enough for malwares, full scan is reserved to antivirus softwares. Although you could configured custom scan to do a full scan, it is not the purpose of custom scan.
 

Macboatmaster

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I will leave it with you


I agree that with MBAM threat scan is the normal scan
From the links I have sent you

Threat scan is the recommended scan type. Routine, full, "custom" scans of all mounted volumes/drives is neither recommended nor necessary.

It is a task better suited to your AV.
That is why it says ROUTINE full custom scan



I have no further comment to make on your topic
 
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Macboatmaster

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You originally asked about quick scans and full scans
When I asked which programs you were using you replied

microsoft security essentials in windows 7 64bit.
I use malwarebytes home premium.
I answered with my advice in some detail.
You now bring Spybot into the equation.

I have previously asked you
I fail to understand what exactly it is that you are wanting advice on
I suspect you have detected a problem on your system
If so please explain what the problem is -
as at the moment we are starting to go round in circles
So if you do have a problem - with your system WHAT is it please



As to the difference between MBAM full scan and Spybot file scan - I do not know. I do not use Spybot. IMHO good as it was in its time it is now outdated and the Tea Timer aspect of the program is often the cause of problems

http://www.bleepingcomputer.com/forums/t/523119/spybot-search-and-destroy-shadow-of-its-former-self/
Certainly scans with one of the three you use would be far better run with the other two disabled.
 

neofan3

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As to the difference between MBAM full scan and Spybot file scan - I do not know. I do not use Spybot. IMHO good as it was in its time it is now outdated and the Tea Timer aspect of the program is often the cause of problems
I never use teatimer so I also don't know about it. However, I read the link you offered, sounds more like competition. Since you don'[t know about spybot, I will modify my question: MBAM configured full scan, does it scan each file through the whole system ?

Note: teatimer is probably a business feature ?
 
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