I recently bought a Dell Studio 1558 laptop (which I've been very happy with), but updating my drivers today I noticed there was an "Unknown device" in the "Other devices" menu. I formatted my hard drive (leaving the reserved OEM partition) after receiving the laptop and turning it on to check it booted etc. - I didn't want any of the bloat software. I re-installed the OS (Windows 7 x64), all the drivers from the disc and Dell support in the correct order, and updated windows.