My friend Henry introduced me to Windows Live Messenger 2009.
I was using MSN Messenger 7.5 lol, kinda outdated.
So I search on Google on “Download the latest WLM 2009” as my keyword.

After downloading the program, I quickly installed it.
All works smoothly until I was at the sign in window where this error pops up…
“Unable to sign into Windows Live Messenger – Error 80004005”

Hmm I wonder, was it my password?
This time, I typed slowly hoping I didn’t made any typo mistakes for the password in asterisk *********
It didn’t work. I guess I have to remove all Messenger for a fresh reinstallation.

I uninstall MSN Messenger 7.5 and MSN Live Plus.
But, I could not find any uninstaller for Windows Live Messenger 2009!
It was not listed under “Add or Remove Programs” nor the uninstaller.exe is located in
C:\Program Files\Windows Live\Messenger

Hmm… I wonder where could it be.
So I looked into “Add or Remove Programs” under “Add/Remove Windows Components”
I found it. After uncheck/untick the box for Windows Messenger, and clicking OK, but it is still there.

How to uninstall Windows Live Messenger 2009 using RUN

To uninstall Windows Live Messenger, click START, then Run if using Windows XP [operating system]
then [type/copy] the following and press Enter: [it works 100%]
msiexec /x {0AAA9C97-74D4-47CE-B089-0B147EF3553C}

You will notice that the Windows Live will be removed from your “Start” > “All Programs” list.

Good luck!

Once you have uninstall it, do a fresh installation by visiting the official Microsoft Windows Live Messenger.