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Consumer Products => Avast Free Antivirus / Premium Security (legacy Pro Antivirus, Internet Security, Premier) => Topic started by: Klauwkikker on October 21, 2011, 12:13:09 AM

Title: Unknown mbr code on Asus Laptop
Post by: Klauwkikker on October 21, 2011, 12:13:09 AM

I het the message "unknown mbr code" from aswmbr.exe. Is this because Asus has a different MBR or can i have a rootkit? I have a Asus Laptop pro15L.

Title: Re: Unknown mbr code on Asus Laptop
Post by: DavidR on October 21, 2011, 12:21:33 AM

What made you run aswMBR.exe ?

Please post the contents of the full log.

Title: Re: Unknown mbr code on Asus Laptop
Post by: Klauwkikker on October 21, 2011, 12:34:59 AM

just curiosity.

aswMBR version 0.9.8.986 Copyright(c) 2011 AVAST Software
Run date: 2011-10-20 23:54:54
-----------------------------
23:54:54.003    OS Version: Windows 6.0.6002 Service Pack 2
23:54:54.003    Number of processors: 2 586 0xF0D
23:54:54.003    ComputerName: PC_VAN_GERRITS  UserName: Gerrits
23:55:03.941    Initialize success
23:55:04.050    AVAST engine defs: 11102002
23:55:14.393    Disk 0 (boot) \Device\Harddisk0\DR0 -> \Device\Ide\IAAStorageDevice-0
23:55:14.393    Disk 0 Vendor: ST916031 0303 Size: 152627MB BusType: 3
23:55:14.455    Disk 0 MBR read successfully
23:55:14.455    Disk 0 MBR scan
23:55:14.455    Disk 0 unknown MBR code
23:55:14.471    Disk 0 scanning sectors +312576705
23:55:14.673    Disk 0 scanning C:\Windows\system32\drivers
23:55:34.657    Service scanning
23:55:36.560    Modules scanning
23:55:57.839    Disk 0 trace - called modules:
23:55:57.854    ntkrnlpa.exe CLASSPNP.SYS disk.sys acpi.sys hal.dll iaStor.sys
23:55:57.870    1 nt!IofCallDriver -> \Device\Harddisk0\DR0[0x8723b0b8]
23:55:57.870    3 CLASSPNP.SYS[8b5638b3] -> nt!IofCallDriver -> [0x85f4a8b0]
23:55:57.870    5 acpi.sys[8069f6bc] -> nt!IofCallDriver -> \Device\Ide\IAAStorageDevice-0[0x85f54028]
23:55:58.463    AVAST engine scan C:\Windows
23:56:07.261    AVAST engine scan C:\Windows\system32
00:00:32.586    AVAST engine scan C:\Windows\system32\drivers
00:01:04.113    AVAST engine scan C:\Users\Gerrits
00:04:17.429    Disk 0 MBR has been saved successfully to "C:\Users\Gerrits\Downloads\MBR.dat"
00:04:17.429    The log file has been saved successfully to "C:\Users\Gerrits\Downloads\aswMBR.txt"


one thing, i have on my Asus expressgate (a light linux distribution) that i can start with a button on my laptop. Could that be the reason for the unknown MBR?

Title: Re: Unknown mbr code on Asus Laptop
Post by: DavidR on October 21, 2011, 01:06:19 AM

That killed the cat.

Whilst Asus may have a customized MBR code, it rather depends on if it has a recovery partition (usually hidden) so you can access the Recovery Console, which would enable you to restore the system to factory settings ?

Title: Re: Unknown mbr code on Asus Laptop
Post by: Klauwkikker on October 21, 2011, 01:12:47 AM

Yes i have a recovery console. So, problem solved? By the way, thanks for your help!

Title: Re: Unknown mbr code on Asus Laptop
Post by: DavidR on October 21, 2011, 01:14:59 AM

You're welcome.

Title: Re: Unknown mbr code on Asus Laptop
Post by: Rednose on October 21, 2011, 01:32:00 AM

Yes, David is right, probbably the recovery partition. I have the same here on two Asus laptops.

Greetz, Red.

Title: Re: Unknown mbr code on Asus Laptop
Post by: Klauwkikker on October 21, 2011, 02:08:16 AM

Ok Rednose thanks for you're reply. I can sleep tonight. ;D