Internet works on pages already loaded but not when I type the address

When I try to go to Google on Opera it doesn't work at all. When I try the same on Qupzilla it works, but if I search anything it says "We're sorry... but your computer or network may be sending automated queries. To protect our users, we can't process your request right now."

I noticed that Yahoo and Bing is working. It must be a Google problem.

You may have some malware, I suggest you do some scans, see my sig for a couple of links.

Run the MS fixit: How can I reset the Hosts file back to the default?
-> (reset hosts to default)

And follow Britton's Malware scan suggestions.

If the problem persists after you've scanned with those tools,

perform a full regiment of Malware scans following this guide: How to easily clean an infected computer (Malware Removal Guide)

There are 9 scanners referenced in the guide, so it will take a while to run all of them.

Also I suggest that you either update or replace your runtime AV program. I don't know what you have, but it let this malware through.