Cannot install AIR 2.5 on Windows XP

Question

After searching and reading in this forum for about an HOUR or so I still have no solution.
I've tried installing Adobe AIR 2.5, AIR 1.5, tried restarting the computer etc.
Nothing works.
I get a message similar to those posted by most users in this forum.
It says that there is an error and that I should make sure that I install it as administrator.
I already have administrator rights, of course!
Here is the content of the error log file:
[2010-10-27:09:34:59] Runtime Installer begin with version 2.5.0.16600 on Windows XP x86
[2010-10-27:09:34:59] Commandline is:
[2010-10-27:09:34:59] No installed runtime detected
[2010-10-27:09:35:03] Starting runtime install. Installing runtime version 2.5.0.16600
[2010-10-27:09:35:03] Installing msi at c:\dokume~1\XXXXX\lokale~1\temp\air49.tmp\setup.msi with guid {XXXXX-XXXXX-XXXXX-XXXXX-XXXXX}
[2010-10-27:09:35:07] Error occurred during msi install operation; beginning rollback: [ErrorEvent type="error" bubbles=false cancelable=false eventPhase=2 text="1603" errorID=0]
[2010-10-27:09:35:07] Rolling back install of c:\dokume~1\XXXXX\lokale~1\temp\air49.tmp\setup.msi
[2010-10-27:09:35:07] Rollback complete
[2010-10-27:09:35:07] Exiting due to error: [ErrorEvent type="error" bubbles=false cancelable=false eventPhase=2 text="1603" errorID=0]
[2010-10-27:09:35:11] Runtime Installer end with exit code 7
Of course, I have the newest Windows updates etc.
I have also the newest Windows Installer.
So, what is the big secret?
Do I need to buy a new computer in order to install Adobe AIR?
(the computer I have is fairly new, despite XP installed on it)

Answer 1

I was finally able to install this POS.
Here is what I did:
I tried to install an even older version than 1.5
I went to filehippo.com and downloaded the oldest version I could find there which was the version 1.0.7
Here is the link to that page: http://www.filehippo.com/download_adobe_air/3853/
Thank God that old version installed on my computer.
After that the installation of current version (2.5) of this POS worked as well.