Question Change BIOS from Legacy to UEFI boot ?

Sep 10, 2021
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Dell Latitude e5550 is currently set to legacy boot; can i simply change it to uefi boot?

just now discovered it was set that to Legacy (bought it used off eBay re-seller over a yr ago with Win-10-pro & new Samsung 500GB MZ7LN512HCHP-000L1 ssd)

- is it OK to simply reconfigure bios from current legacy boot setting to uefi since it has the newer ssd in it? ?

or will it then fail to boot?

is there any reason to do it?
 

lance88

Honorable
Aug 4, 2015
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If your drive is MBR and need to convert to GPT in order to use in UEFI, you dont have to reinstall the entire disk

https://docs.microsoft.com/de-de/windows/deployment/mbr-to-gpt?ranMID=46131&ranEAID=kXQk6*ivFEQ&ranSiteID=kXQk6.ivFEQ-HYF4.x9QUSSl6AxR2Zv4Jw&epi=kXQk6.ivFEQ-HYF4.x9QUSSl6AxR2Zv4Jw&irgwc=1&OCID=AID2200057_aff_7806_1243925&tduid=(ir__tiiqswk92ckf60gaiyumtzj9rf2xra91rkcamwya00)(7806)(1243925)(kXQk6.ivFEQ-HYF4.x9QUSSl6AxR2Zv4Jw)()&irclickid=_tiiqswk92ckf60gaiyumtzj9rf2xra91rkcamwya00

Checks if your drive is MBR format

Follow the link to convert MBR to GPT, you will need to use /allowFullOS to work.

You can specific the disk number if its not 0. Eg, mbr2gpt /validate /disk:0 /allowFullOS

Once completed, restart and boot immediately into bios page and change boot mode to UEFI and viola.
 

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