I picked a FINE TIME not to renew Norton Internet Security. Due to budget constraints, I was forced to switch to a free replacement for Norton last Sunday. Within 72 hours, one of the machines in my home was trashed and owned and demanding money or no more desktop.
After a family meeting, it was decided that we can not afford NOT to have Norton. I was so mad and disappointed that the free solution, which came so very well recommended, did not impede the hijack of Flash and never made so much as a peep about getting disabled and shoved to the side of the information highway.
We all have either Norton 360 or NIS 2011 again. Norton doesn't catch everything ... I know that ... but it WOULD have prevented this cluster. My brother's machine is a 2007 Vista machine with over 1.4 million files and no backup (that is why I switched to Norton 360 Premier 5.0 so he could have a 25GB backup solution through Norton Online Storage). He is an avid/rabid gamer and would have lost files that could not have been replaced.
I didn't know about the April 13th update for Flash until I found a post about it in these forums today and didn't know about Air being affected also (thanks for the post, Quad ... kudos). The Norton Community Forums are worth a lot ... and no, I don't work for or make money off of, blah, blah ... Symantec/Norton. I am just a big fan ... bigger one now.
You get what you pay for ... 
tin
P.S. I got super lucky fixing his machine ... since it was a brand new infection that was shut down immediately, his eRecovery partition was able to do a System Restore, which got us back to his desktop and we could continue the cleanup from there. I might be wrong but it didn't seem that the MBR had been totally compromised ...