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Lenovo released a BIOS update (version 90) for Ideapad S9 and S10 netbooks earlier this month. But here’s a word of caution: Don’t upgrade to the latest BIOS unless you’re willing to risk leaving your computer in an unbootable state. Because that’s exactly what happened to a number of users in the Lenovo Forums. While some people were able to get their systems working again by unplugging the battery and holding down the power button for a while, some users report that the only solution was to contact Lenovo and make arrangements to send their netbooks in for repairs or replacement.

FYI, the BIOS is supposed to resolve a couple of issues affecting power, fan speed, and the battery indicator. It also adds a password-on-bot functionality to the BIOS CMOS settings. And some users report that they were able to upgrade to the latest BIOS with no problems. But unless you’re having major issues with the problems addressed by this BIOS, you might want to wait for Lenovo to release a newer version before updating.

thanks Jose!