On 3/26/21 4:36 AM, saif.re...@outlook.com wrote:
I want it as a dual booted os on my system

If your Windows system is of recent vintage, that is probably not going to work.

I recently purchased, and returned, a high end Lenovo laptop with the intent of dual booting it. The replacement of legacy BIOS with UEFI had two consequences:

1. Dual booting is not possible
2. UEFI introduced vulnerabilities that resulted in the trickbot worm,
   which rewrites your firmware http://trickbot.osmio.ch/

Here's what Lenovo support finally admitted after many rounds of denial:

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Unfortunately, it appears this model is UEFI only and does not support Legacy Boot.  If Legacy Boot was an option on this device it would be enabled by the following (however I do not see this as an option for this machine):

 * Entering BIOS via F1
 * Navigating to the Security Tab and selecting Secure Boot
 * Disabling Secure Boot
 * Pressing ESC to go back to main menu
 * Navigating to the Startup Tab and Selecting UEFI / Legacy Boot
 * However this is not an option for the P17 Gen 1 Please see the
   screen shots attached

 Please let me know if this resolves your question.

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Imagine being that support rep and having to sign off all messages with that last line.

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