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is this normal for Avira?


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#1 tobyo

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Posted 13 August 2011 - 09:27 AM

Wondering if others have had this experience....

I started a virus scan with Avira antivirus and in the middle of the scan it beeped to tell me that it found a trojan (TR/Spy.spatet.BC) and I had to click out of that window before the scan continued. so I clicked "apply" and another window opened telling me I had to restart to complete this task. so I clicked on that button to restart but it did not restart. Instead I manually restarted the computer. when it booted back up the Avira scan started on its own? and it's currently scanning. was it finishing the earlier scan? or what? I have not seen this happen before, 'course I've never had a trojan found on a scan either. oh boy. I wish I knew how that stuff gets on there. I wonder if I look at the browsing history if that might tell me something. anyway, good thing I scanned today!! next up: MBAM scan...

thanks for any help, as usual.

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#2 tobyo

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Posted 13 August 2011 - 10:57 AM

follow up: the scan that ran automatically when I rebooted ended normally. no detection.

#3 TulsaRose

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Posted 14 August 2011 - 08:03 AM

Have you visited the Avira Support Forum? When in doubt about the behavior of a program, I usually check to see if they have a forum.

WinXP Pro sp3 \ Firefox, Panda, MBAM, SAS, SpywareBlaster


#4 tobyo

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Posted 14 August 2011 - 09:51 AM

ah...no! but thanks for the link!

#5 quietman7

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Posted 15 August 2011 - 11:11 AM

so I clicked "apply" and another window opened telling me I had to restart to complete this task. so I clicked on that button to restart but it did not restart. Instead I manually restarted the computer.

That's not unusual for files which need to be deleted upon reboot. MBAM does the same for some types of malware related files. Sometimes the machine will not restart automatically and you need to do so manually just as in your case. After the reboot the file should have been removed.
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#6 tobyo

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Posted 15 August 2011 - 11:36 PM

thanks quietman! I was pretty surprised that the scan was interrupted to remove this thing, have not seen that before. if MBAM finds things, it's at the end that you remove them. well, it is gone now. I've run two more scans since and both were clean. whew!

#7 quietman7

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Posted 16 August 2011 - 07:20 AM

You're welcome.

This is general information about scanning which may be helpful toward understanding things you may encounter from time to time which can be used for future reference.

The speed and ability to complete an anti-virus or anti-malware scan depends on a variety of factors.
  • The program itself and how its scanning engine is designed to scan: using a signature database vs heuristic scanning or a combination of both.
  • Options to scan for spyware, adware, riskware and potentially unwanted programs (PUPS).
  • Options to scan memory, boot sectors, registry and alternate data streams (ADS).
  • Type of scan performed: Deep, Quick or Custom scanning.
  • What action has to be performed when malware is detected.
  • A computer's hard drive size.
  • Disk used capacity (number of files to include temporary files) that have to be scanned.
  • Types of files (.exe, .dll, .sys, .cab, archived, compressed, packed, email, etc) that are scanned.
  • Whether external drives are included in the scan.
  • Competition for and utilization of system resources by the scanner.
  • Other running processes and programs in the background.
  • Interference from malware.
  • Interference from the user.
-- Using two security scanning engines at the same time can cause each to interfere with the other, cause systems hangs, false detections, unreliable results and other unpredictable behavior.

-- If the screensaver, hibernation or Sleep Mode are not turned off before scanning, those features can sometimes have odd effects when attempting to resume normal mode.


Further, it is not unusual for an anti-virus or anti-malware scanner to be suspicious of compressed, archived, .cab, .rar, .jar, .iso, and packed files because they have difficulty reading what is inside them. These kind of files often trigger alerts by security software using heuristic detection because they are resistant to scanning (difficult to read). This resistance may also result in some scanners to stall (hang) on these particular types of files or just ignore (skip) them. Certain files in the System Volume Information Folder like the Tracking.log (created by the Distributed Link Tracking Service to store maintenance information) have also been reported as a source causing some scanners to hang.
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