Why is it so slow to scan my computer using AVG? How do I quarantine on AVG?

I downloaded AVG because I ran out of my webroot, I’m saving up for my trip and I’m not going to spend any money on webroot right now. I ran a full computer virus scan and its not finding the viruses that webroot found. By the way I downloaded webroot’s free trial and it found 2 viruses, both “critical” but since it was a trial, it wouldn’t let me quarantine them. The AVG scan has been running for 6 hours and it hasn’t found the viruses yet. Is it supposed to be like this?

Also, how do you quarantine cookies/viruses when the scan is over. I ran a scan yesterday, stopped it 2 hours later, but not sure exactly how to quarantine cookies and not just delete them. Help please?