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Microsoft Security Intelligence
1 entries found.
Updated on Nov 02, 2012

Trojan:DOS/Gupboot.A is a trojan that overwrites your computer's master boot record (MBR). The trojan is dropped by Trojan:Win32/Gupboot.A.

The overwritten MBR causes your computer to use a malicious copy of "explorer.exe" that is installed by Trojan:Win32/Gupboot.A.

Alert level: severe