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I've just bought an Acer Aspire E1 (572) laptop four days ago, and ran into that UEFI/BIOS problem.

  1. It was shipped with Linpus Lite OS by default.
  2. I had it installed a Win 8 pro on it, after disappointing attempts to do it by myself. It's installed in BIOS mode.

My questions:

  1. What's difference between installing an OS on BIOS or UEFI mode?? For example Win 8 must be installed in BIOS mode or what??
  2. I want to be able to format my Windows as I did before. I mean I want to remove Win 8 pro and install Win 7, reallocate partitions once in while install Linux distros and so on, because I'm a software engineer and yet can do little with this new mess!! Now I want to remove Win 8 and install Win 7 instead and Ubuntu alongside but I have NO clue how to do so!!
  3. I don't want to be thinking I've just wasted my money for some stupid reasons by big selfish companies. Please help me out!!

Thanks a lot!!

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What's difference between installing an OS on BIOS or UEFI mode?? For example Win 8 must be installed in BIOS mode or what??

Simplest difference is the fact you will be unable to use GPT partitions which means your unable to use 2TB+ drives. There are ways to do it, involves doing a few things, but the main system partition is limited to 2TB.

I want to be able to format my Windows as I did before. I mean I want to remove Win 8 pro and install Win 7, reallocate partitions once in while install Linux distros and so on, because I'm a software engineer and yet can do little with this new mess!! Now I want to remove Win 8 and install Win 7 instead and Ubuntu alongside but I have NO clue how to do so!!

This process is well documented. The simplest steps would be to format the HDD, install Windows 7, then install Ubuntu.

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