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I installed ubuntu as a dual boot system with Windows 7. I was on my user account earlier today and I changed the password. I shut down the computer and tried to re-login but I totally forgot the new password. I found a helpful tutorial:

However, I am struggling to find the grub menu. When the computer starts up, I have two options Windows 7 or Ubuntu. I enter Ubuntu and a black screen appears for a quick second and then a purple loading screen starts. After about 20 seconds, it fades and another black screen appears with lines of code. I tried pressing down on SHIFT or pressing ESC. However, each time, it just goes to the Ubuntu login screen. What can I do to bring up the Grub menu?

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struggling to find grub menu yet you say "I have two options Windows 7 or Ubuntu" That is Grub menu. can you explain better? Also it is good to say Ubuntu version (presumably 10.04) – Stefano Mtangoo Jan 4 '12 at 5:19
ok. so I am using an HP computer. It loads and says Windows 7 Ubuntu. you highlight either one and press enter – Joe Jan 4 '12 at 5:23
it is ubuntu 11.04 – Joe Jan 4 '12 at 5:23
I got it to work. Thank you to both of you! – Joe Jan 4 '12 at 6:23
Nice! if it helped you upvote it and accept the correct answer! – Stefano Mtangoo Jan 4 '12 at 6:59

HOLD "Shift" after the "power-on self test", i.e. the first few screens when your PC boots up, then you will get into Grub menu.

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Sorry to sound ignorant but what do you mean by POST? – Joe Jan 4 '12 at 5:49
I got it to work. Thank you to both of you! – Joe Jan 4 '12 at 6:23
@Joe: Please don't thank literally, but vote up and accept the correct answer. – user unknown Jan 4 '12 at 6:47
POST means "power-on self test", i.e. the first few screens when your PC boots up. You can just keep holding shift as soon as you hit the power button. – Stefano Palazzo Jan 4 '12 at 11:18
Exactly @Stefano Palazzo – HexForFun Jan 4 '12 at 13:47

Since you sound to be new to world of Linux (at least to me) I would suggest you go for the Live CD method. Burn the CD and follow the instructions because they are easier than GRUB thing (at least to newbees). Just download a CD from here and follow the instruction here

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