Same here with Qihoo IS that's why I'm not uninstalling it. But when it comes to cleaning a customer's PC, I'll choose Avast! because of it's Boot Scan
Same here.Qihoo Internet security all the way because:
1) Better detection /clean up of viruses than other 2
2) ''Discontinued'' means NOTHING as the program is already finalized , and it is updating normally without problems.
3) Better start up of windows time than other 2.
4) Better and faster support/feedback
5) less buggs than other 2
6) NO ADDS (pop up advertisements etc...)
This is my personal experience as i have tried all these 3 software. I hope i helped you.....