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Is it *really* necessary to turn off A/V when installing/uninstalling?


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#1 deltacoolguy

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Posted 13 October 2012 - 01:30 PM

Is it *really* necessary to turn off A/V programs when installing/uninstalling? In my case right now the program is AutoCAD, but I see this requirement for many programs, so it's something of a generic question as well.

Instructions say to do so, but turning off my avast is not clear, so I searched for instructions and I come across avast forums where everybody says that is "old thinking" and is no longer necessary as it used to be.

Thoughts?

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#2 Orange Blossom

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Posted 13 October 2012 - 02:08 PM

It depends on the program and how deeply it gets into the system. I generally find it a lot easier and faster to uninstall and install programs if I disconnect from the internet, disable all my security programs, close all other applications, then install or uninstall the program. That said, it isn't always necessary to do that.

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#3 Romeo29

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Posted 14 October 2012 - 04:07 AM

What is the use of installing AV if you turn it off when new files are being copied to your system?
Unless you are installing genuine software obtained from a reputed software firm, I find it very insecure practice.

#4 Didier Stevens

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Posted 14 October 2012 - 01:29 PM

No, it is not necessary. I never do it.

Software vendors recommend this just to reduce calls to their helpdesks.

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#5 Orange Blossom

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Posted 15 October 2012 - 06:19 PM

Let me explain myself further:

If I don't know squat about who wrote it, I keep security enabled.

If I do know who wrote it, know it's reliable, and I'm downloading it, I download it with security up and running, and scan the dickens out of it before I install it. If it's a zip file, I unzip it with security up and running and scan it all.

But if I'm installing some megahuge software package from a software writer I know and trust, I disconnect from the internet, shut down security, then install to avoid the strings of alerts I always get when installing. Microsoft Office Suite comes to mind as an example. Edited to add: Note that if I downloaded it, I still scan it when downloading.

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Edited by Orange Blossom, 15 October 2012 - 06:20 PM.

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#6 DarkSnake-Kobra

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Posted 15 October 2012 - 11:01 PM

Unless you are installing a printer driver and/or running an HIPS/firewall software then it's not really needed. If you are then I recommend setting them to training/learning mode.

#7 deltacoolguy

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Posted 16 October 2012 - 01:33 AM

In this case it was a legal and legitimate copy of AutoCAD from Autodesk. I consider them to be legit. I uninstalled it, cleaned everything up, then re-installed. Was doing this because the program wouldn't load. Kept getting to a certain file in the initial splash screen then would hang up and never move beyond that,

I ended up un-installing my avast A/V, then re-installing after I was done. Didn't have a tray icon for some reason and couldn't simply disable it, and this was quicker.

Anyway, it worked. AutoCAD would then load... until I re-installed and activated my avast A/V (paid version, not free). Then I got the same problem.

Long story short, it seems the avast A/V is causing this particular problem. (Not in the way that the initial question asks, of course)

#8 Romeo29

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Posted 16 October 2012 - 03:10 AM

There are some software packages that you cannot really scan. There are packages made using InnoSetup or NSIS etc., they cannot be extracted not even with Uniextract. So you cannot really scan them before installing. Only way to check and scan those is in Virtual Box.

#9 quietman7

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Posted 16 October 2012 - 08:08 AM

...it worked. AutoCAD would then load... until I re-installed and activated my avast A/V (paid version, not free). Then I got the same problem.

Long story short, it seems the avast A/V is causing this particular problem. (Not in the way that the initial question asks, of course)

If you believe this is an issue with avast, then contact and advise them.

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