Computer Learning

[originunknown]

Playbook Blackberry question ... I found a free anti-virus called NetQin that is specifically configured for Blackberry, but I don't find it in App World. So I found it elsewhere on the Net but when I downloaded to my tablet it said do you wish to overwrite this file. I checked File Manager and sure enough there it was and seemed to have been installed the day I bought and first booted up this tablet.

So is NetQin embedded in Blackberry OS and how come I can't access it anywhere to sweep my tablet for viruses etc?

I am confused (once again)
tia
ou

ps what lead up to this was that my wallpaper had disappeared when I opened up tablet today, something that has never happened before?