How to change a preset bootloader

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How to change a preset bootloader

I have 2 pc's and 1 laptop (all less than a year old) and all 3 have been messed with by super smart but nosy roommate. The bootloader for all three (Gigabyte,Asus and Hp laptop) runs from RAM disk (Paragon software boot it bare metal I think) on a virtual drive that has all the different drivers and firmware needed to boot the pc's and reconfigures how my drives are to be setup, how my network is setup and basically the bios is set up before any operating system is even installed. I'm learning Ubuntu because Windows is no help just trying to see how disk gets partitioned. Ubuntu gives me way more info yet I still can't seem to make any changes. Can anyone please help!!!!
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UPDATE-BOOTLOADER(1)					User Contributed Perl Documentation				      UPDATE-BOOTLOADER(1)

update-bootloader - update/change bootloader configuration using Bootloader::Tools perl module SYNOPSIS
update-bootloader [operation] [options] operation is one of --add, --remove or --refresh. valid options are --help, --man, --image <file>, --initrd <file>, --xen-kernel <file>, --xen, --default, --previous, --name <string>, --force, --force-default. DESCRIPTION
update-bootloader will let you modify your bootloader configuration using Bootloader::Tools perl module. OPERATIONS
--add add an new image section. Needs a call to --refresh to take effect. --remove remove the specified image section. Needs a call to --refresh to take effect. --refresh activate the new config e.g. write boot loader to disk PARAMETER
--help Print a brief help message and exits. --man Prints the manual page and exits. --image file specify path to kernel image --initrd file specify path to initrd file --xen specify that you what to add a xen and not a regular image section --xen-kernel file specify that you what to add a xen section with a specific image. Implies --xen option. --default let the new section to be added be the default section if appropriate. Only allowed together with --add operation --previous set some usuable defaults for image, initrd and name when --name string specify the name of the section to be added/removed --force dont complain, just do the right thing --force-default force the new section to be added to be the default section. Only allowed together with --add operation perl v5.12.1 2010-04-22 UPDATE-BOOTLOADER(1)

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