Boot problem after install zorin 17

[mab62]

After i install zorin17 alongside win10 my laptop (acer aspire5750g) can not boot.Error: ‘/boot/grub/i386-pc/normal. mod’ not found

[swarfendor437]

Hi and welcome to the forum. Can you please tell us how you went about dual-booting your computer with Zorin alongside Windows 10?

[zabadabadoo]

@mab62 Hi and welcome to the forum.
I am puzzled how Swarf's question to you has been marked as your "Solution".

[mab62]

after boot only rescue mode was displayed

[Ultrabenosaurus]

If you haven't yet, try booting from USB again and clicking through to "try" Zorin instead of install it, then run the Boot Repair software. Hopefully it will fix your bootloader, but if not it should give you an error message that might help find a solution.

How to fix the boot menu if it disappears

If you have Zorin OS installed alongside another operating system on your computer, you should be able to select which operating system to boot from a menu that appears when the computer turns on. This is known as a “boot loader”, and in Zorin OS we use the GRUB boot loader. However, if this menu disappears (for example, sometimes after a software update in Windows), you should be able to re-configure the boot loader so it will appear again by following these steps: Boot the Zorin OS installa…

I've seen i386 errors around occasionally, but it confuses me as Zorin dropped support for 32bit systems a while ago - of course it doesn't install 32bit grub files!

Out of interest, is your Windows 10 installed as 64bit or 32bit? Some devices of that era have mixed bit-depth hardware, where the CPU is 64bit but the BIOS / UEFI are 32bit and so aren't supported by a lot of modern linuxi including Ubuntu (which Zorin is based on).

Also, according to this Acer community post, the 5750g uses MBR and legacy BIOS, does not support GPT and UEFI. You may need to boot into the installed Zorin (Super Grub2 Disk can help with this) and then flip grub from EFI to MBR as in this guide:

[How To] Convert Zorin Grub EFI to MBR and reverse

There may be instances where a user must change their Zorin OS install from EFI to MBR (legacy) or MBR to EFI. Often, this may be in order to ensure a consistent booting experience if more than one OS is installed. You want all installed OS's to preferably use the same Boot format. To convert from MBR to EFI (Replace sdX with your actual drive I.D. like sda or nvme0n1...): sudo grub-install --boot-directory=/boot --bootloader-id=ubuntu --target=x86_64-efi --efi-directory=/boot/efi /dev/sdX …

P.S. especially if you only have one USB stick, if it's 16GB+, I recommend flashing it with Ventoy. That way you can copy multiple ISO files onto it and boot any of them, without having to keep re-flashing the drive with only a single ISO. This allows you to keep a few linux live environments and other tools like SG2D and Clonezilla to hand and immediately usable.

[Ultrabenosaurus]

P.P.S. have you disabled the cursed boot settings? Secure Boot, Fast Boot, and Fast Startup.

Secure Boot, Fast Boot & Fast Startup Explained

~~~~~~~ "A Brief Explanation" ~~~~~~~ This Topic is a brief explaination for Linux systems concerning "Secure/Fast/Ultra fast boot & Fast Startup". --- What is, "Secure Boot", "Fast Boot", "Ultra fast boot" & "Fast Startup". --- BIOS/UEFI Fast boot: Bypasses certain hardware initialization processes during startup. UEFI Secure Boot: Verifies the signature checks on item for authentisiity.(Kernel,Drivers) Windows Fast Startup: Stores "Last State" instance's, On Startup, Booting back…

P.P.P.S. while poking around in your BIOS, see if there are any settings around SATA mode or SATA operation and, if so, make sure it's set to AHCI rather than RAID or RST or anything else.