hi guys, I just installed windows 7 and was glad with most of its features! The only problem I encountered (besides msn not going into the tray bar. now resolved) is that windows installer of MSI packages will stay still and not run at all. I get NO ERROR message. I tried installing both iTunes x64 and Steam with the same behavior: 3 msexec running in task manager. and one using 13% of cpu steadily without any change in memory. I tried the registry fix and shutting down customer help program via gpedit + reboot no good. I need more help ! thanks! Windows 7 x64 pro EDIT: Well guys, I just found out PANDA ANTI-VIRUS interferes with MSI installers! For others having this problem, jsut de-activate auto-protection while you want to install the softwares.