I installed ZoneAlarm Free Firewall on my Windows 8.1 laptop computer (HP Envy TouchSmart 15-j127TX). I tried to download Google Chrome, the download speed is slow, then stopped after few seconds. I tried to update my Avira Antivirus Free virus signatures, same problem also.

Then I tried to disable ZoneAlarm, then my internet speed back to normal. Is there any settings I need to modify?

I'm using ZoneAlarm Free Firewall on my Windows 7 Ultimate 64-bit desktop PC without this issue, I already compare settings on both computers, so I really cannot figure out what's wrong with it. The Windows Firewall is not on. Both PCs have Avira and ZoneAlarm installed.