I think it still does.. Friends of mine and my dad who have this email address receives this popups sometimes when they sign in on msn. My msn (address) pop ups and sends this message now and then.
I think it was yesterday or the day before that my dad told me that this address popped up again..

I don't use a email program even though I have one
I just sign in via the Internet through a browser or sign in on Msn on Windows Live Messenger

Does the HJ log look clean? Is it a virus that's causing this?

I am somewhat confused here, you didn't say before it was a pop up you said it was spam email. There is a BIG difference between spam...which is an email message and a pop-up which is something that generally pops up in front of the browser...like an advertisement.
What IS the exact email message that is sent? Can you get a print screen of this pop-up? To do this, when it pops up hit the print screen key, generally on the top row of the keyboard to the right of the F12 key. Then open a photo editing program, place the cursor in there and go to Edit, Paste. The print screen or picture of the pop-up will then be placed on the photo program. Save it as a .jpg and attach it here.
There are two things I see in your HJT log #1 is you DON'T have an anti-virus program active on your computer...an absolute MUST and #2...I DO see an MSN Messenger program which auto starts when you turn on the computer. So you say you are not on MSN, you are on MSN from the minute the computer boots up.
The other thing I don't understand is you say....
do you mean have YOUR address in their address book OR have the same address that you have? I find this confusing.
Have you contacted MSN concerning this problem?

ok. first of all it is NOT a popup from browsing.. When i am saying popup, I mean a window popups, that is a MSN chat window popups by itself using the email address. When it pops up, I can get a screenshot of it later.. But this is what I mean.
Ok.. my dad goes on msn and as that email address of mine is in his msn contacts, it sometimes popups or shows as a msn chat window, even though I am not even online on that account.
You know those virus messages when you're online on msn and somebody starts sending you msgs via msn saying like 'IS that you in that picture' . . . . then a link..
Well the email address/account does exactly that with a different msg but a link is provided..

here is the exact message that my msn account sends to other people:
"I have been so skeptical lately on ways to lose weight, but I have to tell you, I found the way finally that works. I lost 23 pounds in the past two weeks with acai berry pills the same ones that were on oprah, they cost me only five dollars over at http://catgood.com"

Yes I do have an antivirus program. It is Trend Micro Antivirus (Chinese version) and it should be active.

No, my MSN does not sign in automatically the minute I boot up my computer. I have to manually sign to go online on MSN..
SO at the time when the spam message that my msn account sends to other people, I was not online on that account.

Ok this clarifies things, this is NOT only email spam but also Messenger Spam. If it is being sent even if you are not logged on this means that your password has been compromised on BOTH your MSN Messenger account and your Hotmail Account. You need to change BOTH passwords along with your security questions for both following the instructions below.
You also need to do the following:
Visit the Windows Live ID sign in website.
Enter your Windows Live ID credentials, and then click Sign in.
Go to Password, click Change.
Follow the on-screen instructions. Make sure you use a strong password, one that nobody can figure out but that you can easily remember. Also when you do this, make most of the letters small letters but have one of the middle letters be a capital letter so if it were your user name here it would read like pinKdiva and then add a number at the end...don't make it an easy number to figure out either...your birth year, your graduation year, an old house address number...something that cannot be easily figured out. Don't use the same password for any of them, be sure to write them down however since you want to make them not easy to crack.
You also need to be absolutely certain that MSN Messenger/ Windows Live Messenger DOES NOT START AUTOMATICALLY when you start the computer. You say it doesn't but according to your HJT log it clearly DOES auto start as shown in the Auto Starting Programs Section:
O4 - HKCU\..\Run: [MsnMsgr] "C:\Program Files\Windows Live\Messenger\MsnMsgr.Exe" /background
and it DOES SHOW as RUNNING when the HJT scan was done:
C:\Program Files\Windows Live\Messenger\msnmsgr.exe
AND also running was WIndows Live Contacts as shown here:
C:\Program Files\Windows Live\Contacts\wlcomm.exe

ok then

I've changed my password into a much stronger one with a combination of numbers and different case sizes
it should be sending spam now

But I want MSN messenger to start automatically when I boot up my computer, so I can sign in using another msn account I have.

You certainly can do this, but why risk it?
Honestly, there is no reason for this. MSN Messenger can very easily be started manually with a click on the icon. Since you have all ready had this happen with one account, frankly I wouldn't risk it happening again. You have seen how easily this happens. But the choice is yours.

Yeah I see.
Well thanks for your help

By changing my password into a much stronger one, would that prevent that account for spending MSN spam to other people?

That was the point of the whole thread wasn't it, to stop this from happening? Your passwords were compromised if the account was sending spam even when you personally had not logged in...that means "somebody" was using the account because the password had been figured out.
Really the choice is yours and yours alone. You can do what you want to do, I was just giving the information it is up to you to decide what to do.