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‘Hundreds of millions’ of Dell PCs threatened by security flaws — what to do

Hundreds of millions of Dell desktops, laptops and servers have serious security flaws that could allow malware to take over the machines.

The flaws, five in all, have to do with a system driver dating back to 2009 called dbutil_2_3.sys, which lets the user update a computer’s BIOS/UEFI firmware (the low-level motherboard software that starts up a PC) from Windows. 

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