I recently purchased a 64-bit Windows 7 Home Premium system which came with Norton Internet Security installed. I ported over my Qt 4.4.3 installation and tried testing a known program. Norton flagged uic.exe, rcc.exe and moc.exe as security risks and DELETED them from the computer! I was able to recover by overriding Norton's objection to the programs.

Just a warning to others. I will be uninstalling Norton and installing AVG9.0 soon.