Exclamation Redirecting from google.com to fake Flash Player page

Hello everyone,
I have got a big problem. Yesterday, my phone have started to redirect from google.com and facebook.com pages to fake Flash Player page. I can't remove this issue, even flash a firmware didn't help me. Also I can tell you, that before i notice that, my girlfried used my phone and install some games "from unknow sources", not from Google Play.

Anyone could help me to get rid out of this problem?

And sorry for my bad English... I have hope, that you can understand me

EDIT:
I forget to write, that I use Wi-Fi connection, and I didn't try 3G. I don't have a data packet.

EDIT2:
Now i resolve the problem. It was my router, I have restored it to fabric settings and everything works fine now, but I wonder how it is possible that my computer wasn't affected by this issue.

Anyway, thread may be closed.