Windows Installer Problem - Error 1721

Hi everyone!

I've been trying to install Kaspersky Internet Security 2010 and I keep getting the following error:

Error 1721.There is a problem with this Windows Installer package. A program required for this install to complete could not be run. Contact your support personnel or package vendor. Action: InstallDriverKlim6X86, location: C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2010\KLIMX86\netcfg.exe, command: -g klim6 -l "C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2010\KLIMX86\klim6.inf" -t "C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2010\KLIMX86\klim6.cat" -z klim6.cat -c s -n kl_klim6 -i

I have contacted Kaspersky and they told me that it could either be due to the fact that the windows installer that I have is corrupt or it could be a virus.

So I first went to this site:

http://www.microsoft.com/downloadS/...6F-60B6-4412-95B9-54D056D6F9F4&displaylang=en

to download the windows installer, but when i tried to install it/update it, i got an error saying "The update does not apply to your system".

So, I did some other things that they asked me to and it seems that I don't have a virus. There were some traces of another antivirus on my laptop, so I followed a link that they gave me and uninstalled it.
However, I still get the same error when trying to install Kaspersky!!

I have made sure that Windows Installer is running...

Is there anything I can do?? I really need to install that Internet Security thing!

I am running Windows Vista Home Premium 32-bit SP2. I have just installed the SP2, but it wasn't working with SP1 either.

Please HELP!!!

Thanks,
Maria

Try this. On the install file, right click and run as administrator.

nop, it's not working.. same problem again..=/