Almost every install document I've ever read says disable antivirus and firewall. I actively disregard every such instruction and rarely have a problem. If you

Almost every install document I've ever read says disable antivirus and firewall. I actively disregard every such instruction and rarely have a problem. If your antivirus product is any good, it will work fine with legitimate software. But that is entered solely as a support disclaimer for "I can't guarantee anything if anything else is running on your system".