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Boot Sector Virus on Dual Boot System

Discussion in 'General Security' started by masica, Oct 11, 2008.

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  1. masica

    masica Thread Starter

    Joined:
    Dec 6, 2004
    Messages:
    71
    I run a home-built dual boot system. Specs:
    W2K Pro + all service packs current. Win XP Pro + SP 3. Intel P 4 2.4Ghz, ASUS P4B266-C mobo, 80GB HDD, 2GB DDR RAM.
    On the W2K Pro partition, I have Avast AntiVirus installed with all signatures current. On the XP Pro partition, I have AVG with all signatures current. I also run Spybot S & D. I run FireFox on both partitions.
    Iwas on the XP Pro system today and was booted off FireFox and my system rebooted. During a reboot, I always get the option to either boot to W2K Pro or WXP Pro. At that screen, I get a warning that I have a boot sector virus on my hard drive. I am advised to put a clean floppy in and reboot and asked if I want to continue.

    Long story short, I was able to get past the prompts and boot up to W2K Pro. I ran my Avast AV and came up clean. I also ran SpyBot and came up clean. I was able to get back to the XP Pro partition and ran an AV scan a it found a couple things:

    MsUpdate.exe and Trojan Horse downloader.generic7.AOVP

    It also changed/cleaned up:

    G:\WINXP\system32\kernal32.dll
    \wsock32.dll
    \user32.dll
    \shell32.dll
    \ntoskrnl.exe

    The PC seems to work fine except for the 'boot sector virus' warning and prompts when I boot. I'm a bit reluctant to shut down at this point. Any ideas how to proceed?
     
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