Recently my live mesh software stopped connecting so I tried to uninstall it so I could reinstall and fix the problem. I am now getting a message that the Windows Installer service is not available. When I go to Services and try to start the Installer I get an error 5:access denied. I have run scannow and it has fixed my msiexec.exe file several times but when I try to run msiexec /unregister I get "Windows cannot access the specified path, file. You may not have the appropriate permissions to access the item" I have tried to run the Installer clean up utility I get an error. I have tried to install the Windows Installer (MSI) 4.5 and I get a message that the update does not apply to my system. I am running out of options and would like what do try next. And would like to know why this problem is happening now. Was there an update that I installed that caused this problem? I really do not want to reinstall windows and start all over so a workabnle solution would be appreciated.