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Re: Booting Linux mint

Don't worry about the time difference:  you can always change that under "Settings". 

Now that you have installed Mint, ensure that the USB stick is removed before booting.  Your machine will try to boot from the first device listed in the "Boot Order" you have set but as the USB stick is absent will try the next device in the boot list (often the DVD) and failing that it will try your HDD where, indeed, you have put the operating system.  In other words, just boot without a Live USB or Live DVD inserte...
Don't worry about the time difference:  you can always change that under "Settings". 

Now that you have installed Mint, ensure that the USB stick is removed before booting.  Your machine will try to boot from the first device listed in the "Boot Order" you have set but as the USB stick is absent will try the next device in the boot list (often the DVD) and failing that it will try your HDD where, indeed, you have put the operating system.  In other words, just boot without a Live USB or Live DVD inserte...