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Fix: Invalid Firmware Image at Dell Inspiron 3537 BIOS update

For some time now I was trying to update the BIOS of an older Dell Inspiron 3537 laptop from inside Windows (with the InsydeFlash application that the respective Dell update package employs), only to get a blue screen saying Invalid Firmware Image upon reboot and the BIOS update was skipped every time.

Since that update was fixing a critical security issue (Intel Security Advisory INTEL-SA-00115 – CVE-2018-3639 & CVE-2018-3640), I decided to do some more research on it. I eventually came to the conclusion that since I had A9 BIOS version, I needed to install BIOS version A10 first (which addresses CVE-2017-5715 and associated Intel Reboot issue), then try the BIOS version A11 update that the Dell Support online was offering.

Luckily there was a Dell BIOS update guide that was suggesting to visit Dell downloads catalog to find older updates, from where I found all Dell Inspiron 3537 updates and was able to locate the A10 BIOS update.

Updating the BIOS from version A9 (the version I had, as displayed at “Current BIOS” field on the InsydeFlash UI) to A10 and then after reboot from A10 to A11 with the respective update executables worked fine. Can confirm the update is done by launching the update once more and then just Cancel.

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