Safe Mode

General Topics
1

I am unable to start a scan in Safe Mode with the Free Programme. The box that I chose and start what to scan does not come up even if it seems tt show the task bar. Is this normal?

That you

2

No, avast can scan at Safe Mode.
Do you have any other antivirus installed in this machine?
Why are you trying to scan in Safe Mode? Is your computer infected?
Can’t you scan a boot time scanning with avast?

3

avast doesn’t start by default in safe mode, so you need to click on the desktop icon (or directly using this file ashAvast.exe in the avast4 foloder) to start the necessary processes and the memory scan and simple user interface should start.

Is this the way you were trying to start the scan ?

What is your OS ?

4

Well, my problem is that yesterday while surfing Avast came up with a box about a Virus. I reacted so fast thatI closed the box before finding out what it was and whether I was being prompted to delete something. Now I am not ure if I actually allowed the virus to come in by not doing anything at the time. I have scannd several times with various programmes, including twice with Avast. usually I scan in safe Mode but with Avast when I go into Start/Programmes /AvastAntiV/AvastAntiV something opens on the task Bar but that is IT. Only on the task bar and the box for the scan never appears.

Incidentaly, of all the scans that I did only Panda came up with Bck/Bandok. AY which Avast just before did not detect.

Any ideas apreciated.

Thanks

5

You don’t have to use Safe Mode to scan with avast.
You can do within Windows or use avast boot scanning.

6

Hi Tech

What’s (how) Avast Boot scanning? But, anyway what I wanted to know is whether the factthat I could not get Avast to work in Safe Mode is normal, or whether it could be due to a virus interfering.

Thanks

7

Start avast! > Right click the skin > Schedule a boot-time scanning.
Select for scanning archives.
Boot.
If infected files are found, it’s safer to send them to Chest instead of deleting them.
This way you can further analysis them.

See also: http://www.digitalred.com/avast-boot-time.php

8

Thank you Tech

I got it!

Now, one more really important question: how does Avast deal with a Virus when the user does not respond to the warning? Yesterday, when I closed the warning box, would Avast go ahead and get rid of the virus? Probably, it had done so already, or not?

9

It entirely depends on what alert is displayed.

Web Shield, Standard Shield or Email scanner.
So which was it ?

Whatever happens the one common thing it it won’t let it run.

10

That’s my problem. I expect There might have been an ‘abort connection’ button which I necer saw and never pressed. Does that mean the virus continued to load? And how come that Avast can’t find it now?

Thanks for your help

11

Nothing. The file will be there but wouldn’t be executed (i.e., the virus won’t be activated).

12

Thank Tech, but why? (Porquê)

Why should it not activate if it has been downloaded. Coudl you explain, please? I’m worried.

Obrigado|

13

Well, it’s not that complicated. A file could be in your computer and if it’s not double clicked (if it is not opened, if it is not started or executed), it will stay there, inert, causing no harm at all. With the on-demand scanning you can find it and send it to Chest (quarantine). IF anything tryes to start it and execute it, the on-access (resident) antivirus will block the execution and, consequently, the infection.

14

Great, thanks.

Now, how can I do the on-demand scanning?

Thank you for everythng.

15

Can you start avast antivirus? (by right clicking the icon on system tray or running ashSimpl.exe)

16

Ahhhh… you mean start the AntiVirus? Well, I did it already three times and it found nothing.

I thought you meant a special ‘on-demand’ facility.

But then, if the virus file was downloaded Avast should ahve found it afterwards, no?

Sorry about going on and on…

Thanks

17

If avast can detect it (i.e., the virus signature is into the database), yes, it will be caught afterwards.

18

If you recieved the box with “abort connection”, then it was the webshield that detected the virus. The virus wasn’t downloaded.

19

If you recieved the box with “abort connection”, then it was the webshield that detected the virus. The virus wasn’t downloaded.

Even though I did nothingabout it? So, what is the point of the “abort connection”?

Thanks

20

To stop it getting on to your system that is why there is only one option, but primarily to alert you to the problem. It just drops that connection and closes out the alert state.

You can elect have this run silently, Web Shield > Customize > Advanced > Silent mode, so you won’t be notified, it will just drop the connection silently. However, this isn’t a good idea as if there was a suspect/infected site, you wouldn’t know it you browser would just keep saying the page contains no data or words to that effect and you don’t know why.

The avast Web Shield won’t let you download the suspect file even if you choose nothing (closing the window with the X rather than the Abort Connection), in the same way the standard shield won’t let you run and infected file on your HDD.

Even if you choose No Action in the Standard Shield, that means take none of the listed actions, but it won’t allow you to run the infected file no matter how many times you click no action.