Problem With Windows Installer

Hello.I don't know is this the right section,but I have problem with Windows Installer.This is my second installation.The first run's great,but the stupid Windows Toolkit 1.8 f**k up all.So I installed again Windows 7 x86 from the same DVD.When I installed Skype 3.8,the Windows Installer configurate Skype 3.8 each time,when I start it and move the icon on the desktop.I know that Skype 3.8 don't work fine under Windows 7,but on the first installation it worked fine.So I installed Skype 3.6 and the same problem again.Now I am with Skype 4.1 and everything works fine for now.On the first installation I used Microsoft Office 2003 without problems and my friends also.But now I have the same problem with Microsoft Office 2003 like the problem with Skype 3.8/3.6.Windows Installer is configurating...So I installed Microsoft Office 2007 SP2 and the same problem.Now I am again with Microsoft Office 2003 and it takes too much time to open a .doc or .xcl file.Can I fix this problem with the Windows Installer or I must Install Again a fresh copy?One new Installation for make take 4-5 hours with all the settings,games and programs,so that is not so easy.

7600 RTM.I will try,but I dont think that will fix the problem.

I deinstalled Microsoft Office 2003 with Your Uninstaller (not the trial version) and I installed it again.The problem remains.

Afcourse :).