I have SBS 2008 with Exchange 2007 SP1, and I'm about to apply SP2. When trying to install update (exchange SP2)I get the message that I need to install WINDOWS INSTALLER 4.5. Here is the issue that Im facing: trying to install windows installer I get the message(NO ENOUGH STORAGE IN AVAILABLE TO PROCESS THIS COMMAND. I know i have plenty of storage available what else could be the issue?