Malware 'hijacks Windows Updates'

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Virus writers may be able to smuggle malicious files onto a computer using Microsoft's security patch updates, experts say.

At least one program is in circulation that can hijack a key component of Windows Update to introduce malicious software that could be used to hijack a computer.

The method bypasses users' firewall, allowing files to download undetected.

Microsoft said it was aware of reports of the attack.

Security expert Frank Boldewin said on his website that he had recently noticed an e-mailed trojan - a type of program or message that looks benign but conceals a malicious payload - which was exploiting a Windows program known as the Background Intelligent Transfer Service (BITS).

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