At first I thought there was something amiss with the download. I eventually got "help" from apple support and they suspected it was my router. Not sure why. Their suggested potential fix was pretty complicated so since I was okay with my latest iTunes I skipped the update.
Then I wanted to download adobe AIR and got the same message.
The adobe and iTunes sites seem legit and trustworthy and I don't understand why I would be getting this message suddenly. I haven't changed any security settings or anything.
I have Norton security.
I tried to install Firefox to use it to download the programs but got an error message saying "the file is corrupt".
I tried going into IE security settings and adjusting a bunch of stuff - I checked "allow software to run or install even if the signature is invalid" since it was unchecked and I want to install the software even though IE keeps telling me the signature is invalid. I also checked or unchecked some others relating to security certificate stuff and tried again with different combos. Again, same message "unknown publisher" and the invalid signature thing.
What the heck? Why is this happening suddenly? Never had problems like this before.
Edited by KL23, 28 December 2009 - 01:30 PM.