Hello everyone, I've had this problem for quite awhile now and i can't find the solution. Basically, everytime i try to install a program that uses .msi files, windows explorer stops responding then starts to periodically freeze and i end up having to hard reboot my computer. This is extremely annoying as i can't install important programs like java and such. I am using windows 7 64 bits. I have no idea how to fix it, i don't know how to reinstall windows installer. Thanks for any help.