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I just installed Ubuntu and I got the error "executing grub-install /dev/sda failed this is a fatal error" but Ubuntu works fine. Should I worry?

id flag

I had Windows 10 installed on my computer and I began installing Ubuntu alongside Windows. Everything seemed to be going okay until I got the error. Afterward, it told me to restart and I did, and Ubuntu seems to be working fine. Does that mean that my Ubuntu OS was installed okay? Do I need to fix my installation of GRUB, or is this an error message I can safely ignore?

David avatar
cn flag
You can start with what version of Ubuntu? Does windows boot?
Knud Larsen avatar
by flag
»» grub-install /dev/sda failed «« : This message *can* happen for no reason. ..... I have seen the same message a couple of months ago, and the new installed Ubuntu booted OK. ( I have numerous Ubuntu versions installed on multiple computers, so I don't remember 'version'.)
Gabe027 avatar
id flag
@David The version of Ubuntu is 21.04. Windows boots normally also. After I installed it a grey box popped up telling me software updates were available so I clicked update. While it was updating "Writing GRUB to boot device failed and a checkbox pops up that says "Continue without installing GRUB?" I clicked continue and there hasn't seemed to be any problems so far, but apparently there's a problem whenever my computer tries to update or install GRUB.
Gabe027 avatar
id flag
@Community I guess I'm asking if the error message that I got "executing grub-install /dev/sda failed this is a fatal error" means that I need to do something to fix my installation of GRUB, if error this will cause me problems in the future if I don't fix my installation of GRUB, and how I can go about fixing my installation of GRUB if I need to do so. In the above comment I mentioned how I got another error for GRUB when doing an update, so I'm wondering how I can avoid getting all these GRUB error messages
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