Whenever i try to install any software(eg:quicktime player, msoffice, dotnet framework 3.5 etc) that uses windows installer feature in windows 8.1 pro preview, it freezes the installation(no error message displayed) and i have to end the process from task manager.I tried many registry cleaners and windows installer repair softwares but nothing helps.I don't know how to repair or re-install windows installer in windows 8.1 pro preview blue version.please help me to resolve the problem.