Error 1721. There is a problem with this Windows Installer package

I am trying to install VIPRE Antivirus on my Windows Vista machine and am not able to successfully complete the installation. Despite several attempts it comes up with an error message, that there is some problem with Windows installer service.
I am not using the installer for any other software installation. I have already rebooted the machine to make sure, there is no other program using the service.
Can someone help me with this issue?
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: UninstallFWSDK_32, location: …fwsdk_installer.ex…
