Windows Vista Programs will not install correctly

Recently I have had 2 programs that will not install correctly in that they appear to install okay but when starting vista one of the programs intermittently reinstalls itself and another one appears to install then when I run it asks for the CD and will not install.

I think this may be that my Vista Windows Installer is corrupt but I cannot find the correct one for vista the only one (I could find) was the Windows Installer 3.1 but it states it is for every operating system except vista.

Link:
http://www.microsoft.com/downloads/details.aspx?FamilyID=889482fc-5f56-4a38-b838-de776fd4138c&DisplayLang=en

I have heard that vista's version is 4, if this is so does anybody now where this can be downloaded so I can investigate my problem further.

Paul

 

The 2 programs in Question are:
Ulead/Photoimpact X3
Roxio Copy & Convert

And yes, I have been on there forums/help pages with no real positive answers, that is why I have gone the route "Must be my computer and not the software "

 

Yes I am

 

http://support.microsoft.com/kb/931361/en-us

Also, if you have turned off User Account Control, turn it back on.