Windows Installer error

[Jason]

I can install most new programs or utilities on my XP
based computer. However I purchased a Microsoft trackball
explorer mouse and cannot install the MS Intellipoint 4.1
software from the CD. I get the following message.
"The Windows Installer Service could not be accessed.
This can occur if you are running Windows in safe mode,
or if the Windows Installer is not correctly installed.
Contact your support personnel for assistance."
How can that be if the installer works for other
products?

 

[Taurarian]

The "Windows Installer Service Could Not Be Accessed" Error Message appears
When You Add or Remove Program
http://support.microsoft.com/default.aspx?scid=kb;en-us;315346

Windows Installer Fix (Line 94)
http://www.kellys-korner-xp.com/xp_tweaks.htm

Troubleshooting Windows Installer
http://www.kellys-korner-xp.com/xp_w.htm#xp_wininstaller

http://www.kellys-korner-xp.com/xp_w.htm
and scroll down to: "Windows Installer" - download and run the "WI.zip"
file.