I wouldn't think that McAfee would object as it is only image files not executables I don't think. It may be worth a try to disable McAfee and try the download. Another suggestion which might help is to enable the debug log (help->Enable debugging log) which opens a debug log window. I've never known it to help in hangs (it usually doesn't report anything useful) but it may in this case. I just tried it and it reported this (on my up to date system):
http://fritzing.org/download/feed/atom/windows-64bit/?version=0.9.3b.04.19.5c895d327c44a3114e5fcc9d8260daf0cbb52806&sysname=Windows&kernname=NT&kernversion=6.1&arch=x86_64&sysversion=7%20&pid=85eb98cd2a7df648a2f657e0d4329ebeF%20Server%202008%20R2%8
http check new version
http check new version no error
before reporting no new version and no updates so it may say something when it fails if we are lucky.
Peter
