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Windows 7: laptop slower since MSE found a potential threat (and didn't deal??)

16 May 2016   #1
ajaye

64 bit, Windows 7 Home Premium SP1
 
 
laptop slower since MSE found a potential threat (and didn't deal??)

Last night I ran a Microsoft Security Essentials full scan on my laptop. It found something it called potentially dangerous software. (I didnít write down what it found, but remember the words Trojan and win.) I pressed the button to clear it and that process started but stalled about three quarters of the way through. I waited for a good hour but it didnít get past that stalled point so I downloaded and ran the free Malwarebytes Anti-Malware - it didnít find anything in its scan. I then ran an MSE quick scan and it didnít find anything then either (I didnít have enough time to do another full scan, which had taken a few hours).

Since this happened my laptop is markedly slower to start up. It takes a couple of minutes for the desktop items to appear and it never used to. Once everything does actually come up it seems to work the same as usual.

Iím running another MSE full scan this morning but it will take a few hours, so I thought Iíd post here now in case thereís some things I should be doing instead/in the meantime.

A couple of times during the MSE second, quick scan last night, and todayís scan, Iíve noticed a little MSE box come up (for only a couple of seconds) with a green tick saying detected threats are being cleaned.

Thanks in anticipation


My System SpecsSystem Spec
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16 May 2016   #2
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

Here is a scanner I use with good results and it's free. It will take some time to do the scan.

Free Virus Scan | ESET Online Scanner | ESET
My System SpecsSystem Spec
16 May 2016   #3
ajaye

64 bit, Windows 7 Home Premium SP1
 
 

Thanks L Bear. Should I stop the current MSE full scan or wait for that to finish?
My System SpecsSystem Spec
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16 May 2016   #4
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

Just let MSE complete.

Here is a picture of how I do my settings with Eset online scanner.

I'm no security expert but this has always worked for me.




laptop slower since MSE found a potential threat (and didn't deal??)-eset-online-scanner.png


My System SpecsSystem Spec
17 May 2016   #5
ajaye

64 bit, Windows 7 Home Premium SP1
 
 

I stopped the MSE scan yesterday to go to work. Started it again when I got home and it took six hours to do the full scan (is that normal?) It found the same threat again so I took a screen shot. I left the laptop on overnight and the removal process is now about 70% through (computer kept going to sleep, I woke up to wake it up occasionally). I'll let it continue, see what happens and will report back.


Attached Thumbnails
laptop slower since MSE found a potential threat (and didn't deal??)-mse160517.png  
My System SpecsSystem Spec
17 May 2016   #6
ajaye

64 bit, Windows 7 Home Premium SP1
 
 

MSE finally finished removing the threat. But I don't know that it has removed the threat. It says it was successful but also that an error was encountered ... ??? I've included a screenshot of that.

I restarted the computer and it is still unusually slow to get up. When the empty desktop appears if I click on MSE it says real time protection is not turned on. I've included a screenshot of that.

After four minutes the desktop items came up and the real time protection turned itself on. I've included a screenshot of that too.

As I now have the name and location of the threat (see Post 6) is there a more appropriate way to deal with it or should I try running one of the scans recommended above?

As I'm typing the little window I've never seen before this episode popped up so I've taken a screenshot and included it as well.


Attached Thumbnails
laptop slower since MSE found a potential threat (and didn't deal??)-mse160518.png   laptop slower since MSE found a potential threat (and didn't deal??)-dtopa.png   laptop slower since MSE found a potential threat (and didn't deal??)-dtopb.png   laptop slower since MSE found a potential threat (and didn't deal??)-msedeal.png  
My System SpecsSystem Spec
17 May 2016   #7
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

Their are some reports that (win32/dyanmer!ac) is a false positive and many more say it's a real Rootkit.

From Microsoft.

https://www.microsoft.com/security/portal/threat/Encyclopedia/Entry.aspx?Name=Trojan:Win32/Dynamer!ac

Did you or did you not run Eset Online Scan? If you did what was the results.

When you ran Malwarebyte Anti Malware did you have rootkit selected.

laptop slower since MSE found a potential threat (and didn't deal??)-malwarebytes-today-tomorrow.png


My System SpecsSystem Spec
17 May 2016   #8
ajaye

64 bit, Windows 7 Home Premium SP1
 
 

No I haven't yet run Eset, each step is taking so long. (and I've got super slow internet as well.)

Just checked and no, scan for rootkits was not selected in Malwarebytes. I've now selected it and am running that scan again.

Will try Eset if that doesn't work.

Thanks again
My System SpecsSystem Spec
17 May 2016   #9
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

Your scans will only run as fast as you hardware will allow.
If you have a slower computer the scans will run slower.

MSE and Eset will always take a long time.
My System SpecsSystem Spec
17 May 2016   #10
Golden
Microsoft MVP

Windows 7 Ult. x64
 
 

What is d:\preload\base.wim?

Looks to he HP-related? I suspect a false positive. Navigate to the folder MSE is having an issue with and determine the legitimacy of the files.

If they are legitimate system files, than the HP OEM software that starts as part of the system may have been buggered by MSE causing your slow performance issues.
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