Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: Does this sound like malware, or system file corruption?

25 Feb 2015   #1
NobodyIsHome

Windows 7 Home Premium 32-bit
 
 
Does this sound like malware, or system file corruption?

Yesterday when I booted my computer, I got the "Windows is updating, do not turn off your computer (or whatever)" screen. Immediately I was concerned because I did not do any updates the day before, and I have updates set to notify, but not download, the updates. Eventually the log-in screen came up so I logged in and did what I was intending to do. Since I tend to be a little paranoid, when I was done I decided to do a Malwarebytes Anti-malware scan. I started the scan and left the room. Returning 5-10 minutes later, my computer was on the bios screen! I couldn't figure out how to get out of there, so I did a hard shutdown. I then restarted the computer and it booted normally (I mean other than getting the screen "Windows did not shut down properly"). I decided to try the scan again, but this time I first cleaned the drive using Ccleaner. After cleaning I noticed it deleted a larger amount than usual, about 750 megs. Upon close inspection, I notice one file was 700 megs, the CBS_log file under Windows System Log files. I did some quick research online and it seems the cbs log file is a Windows log file that lists system errors. Anyway, I did the MBAM scan and this time it completed, and came back clean. While doing the research on what is a cbs file, I also came across instructions on the "System File Check (SFC) scan." So I did that scan (verify only) and that scan came back "Windows did not find any integrity violations."

Being somewhat paranoid as already stated, today I did a whole C drive scan using 1) Windows Malicious Software Removal Tool; 2) MBAM (again); 3) Malwarebytes Anti-Rootkit; and 4) Avast; and all 4 came back clean.

So, as the header asks, does what happened to my computer yesterday sound like malware, or just a system file(s) corruption? It appears to me to be the latter, but I'd like the opinion of some experts (which I am not). Thanks.


My System SpecsSystem Spec
.
25 Feb 2015   #2
derekimo

Microsoft Community Contributor Award Recipient

 
 

Did you check your update history? There was an out of band update released yesterday or the day before.

Update changes the currency symbol of Lithuania from the Lithuanian litas (Lt) to the euro (
My System SpecsSystem Spec
25 Feb 2015   #3
americancritic

Windows 7 Home Premium 64-Bit SP1
 
 

Hello and welcome if it is a system file corruption have you tried to do a SFC /scannow to see if it will repair it's self if not try here are the instructions.

SFC /SCANNOW Command - System File Checker
My System SpecsSystem Spec
.

25 Feb 2015   #4
AddRAM

Windows 7 Pro x64 Windows 10 Pro x64
 
 

He did a scan, it found no violations.
My System SpecsSystem Spec
25 Feb 2015   #5
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

It sounds like one of those gremlins for which we never find the cause. I think you have done the right things and there is nothing to worry about. I doubt that malware would start the system file checker - that just makes no sense.
My System SpecsSystem Spec
25 Feb 2015   #6
edy1en

Windows 7 Ultimate x64
 
 

so you did worry about " I'm having a weird Windows Update, i leave them but it comeback with BIOS screen without someone triggering it?

try this check list:
1. are you using laptop? does the F2 keys faulty?
2. did you use bios update program installed? maybe you did do something with the program before.
3. try to dump your bios to file and check the hash with the one you downloaded from manufacturer website and compare it. since setting is in the ram part, you will have same checksum with the bios with same version, if not.. maybe it is some advanced rootkit or virus entered your system.
of course if you don't want to be hassled with this part... just get updated bios and flash your bios with it.
My System SpecsSystem Spec
25 Feb 2015   #7
ThrashZone

Win-7-Pro64bit 7-H-Prem-64bit
 
 

Quote   Quote: Originally Posted by derekimo View Post
Did you check your update history? There was an out of band update released yesterday or the day before.

Update changes the currency symbol of Lithuania from the Lithuanian litas (Lt) to the euro (
I love those types of updates so much I Hide them for later
My System SpecsSystem Spec
25 Feb 2015   #8
AddRAM

Windows 7 Pro x64 Windows 10 Pro x64
 
 

You don`t have windows update set to automatic do you ?
My System SpecsSystem Spec
26 Feb 2015   #9
NobodyIsHome

Windows 7 Home Premium 32-bit
 
 

Quote:
derekimo wrote:
Did you check your update history?
Yes, the last thing listed was from 2 days before.

Quote:
americancritic wrote:
have you tried to do a SFC /scannow
Yes, it came back okay.

Quote:
AddRAM wrote:
You don`t have windows update set to automatic do you?
No, I have it set to check, but download it myself (not automatic).

Quote:
whs wrote:
It sounds like one of those gremlins for which we never find the cause. I think you have done the right things and there is nothing to worry about.
That's what I'm thinking.

Thanks to everyone for your help/comments.
My System SpecsSystem Spec
Reply

 Does this sound like malware, or system file corruption?




Thread Tools Search this Thread
Search this Thread:

Advanced Search




Similar help and support threads
Thread Forum
Changing File Decription for link to Malware Bytes Anti-Malware
Have been using Win 7 Ultimate x64 for quite a while but tonight ran into a small problem. I like to keep the titles for links very short and want to rename "Malwarebytes Anti-Malware" (I am a registered, paid user) to simply "Malwarebytes". I am listed as an Administrator and I used LockHunter to...
System Security
How to avoid system file corruption due to driver updates
My old laptop had this issue: http://www.sevenforums.com/graphic-cards/339450-intel-graphics-adapter-wddm1-1-driver-update-causing-system-corruption.html It was working fine until one day it stopped booting into normal mode; it turned out that a Win7 download of an Intel graphics driver update...
General Discussion
Random file corruption - Win 7 32-bit
This problem seemed to originally occur after a bsod and a consequent shut down, but I am experiencing multiple issues with corruption on a daily basis now. The second time it occurred was during an installation, during which some files became corrupted and I had to redownload the files. The third...
General Discussion
Major file corruption system wide
And I have no idea how. I noticed that iTunes deleted more then half of my photos off my ipod, but didnt think anything of it, and then i started yahoo messenger and it said it was corrupted and to run a chkdsk. So I did, and this is what it came up with (below). What caused this? All my photos are...
General Discussion
file corruption?
I have a copy of my maths assignment (my most recent version...which is not backed up) that I have been unable to open. The error is: The file cannot be opened because there are problems with the contents. Details: The name in the end tag of the element must match the element type in the start...
Microsoft Office
File corruption?
I have a copy of my thesis (my most recent version...not backed up of course) that I have been unable to open. The error is: The file cannot be opened because there are problems with the contents. Details: The name in the end tag of the element must match the element type in the start tag. ...
Microsoft Office


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 22:52.

Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App