Hi, I purchased a new computer yesterday that already had Windows 8.1 installed on it. After setting up my new computer it was running fine, as fast as you'd expect a new computer to run. I installed Nod32 Antivirus and everything started running so slow I couldn't click on anything without it freezing or crashing. I looked up information on my phone and saw that Windows 8.1 already has av installed on it and that two programs running together would mess things up. I temporarily disabled Nod32 Antivirus and now everything is back to normal. After looking at the system requirements on the back on the Antivirus package I saw its System Requirements are for Windows 8 and older. Does this mean it is not compatible with Windows 8.1? I am unsure if I should uninstall Nod32 or if I should uninstall my other system, as I would prefer to use the Nod 32 antivirus. I hope I have provided enough information, I am a newbie and haven't had a computer in years.