When you use a Wireless Hotspot, you have more to worry about than viruses. Hackers are notoriously known for “sniffing” wireless “traffic” going through the air, searching for logins and passwords and such.
As Leo Laporte has pointed out, you need to follow safe computing practices. These include not running as an Administrator unless you absolutely need to. Also, download and install updates as soon as they are released via Windows Update.
Some hotspots use WPA encryption to help secure and protect users, though places like Starbucks don’t. Either way, you should run an antivirus, firewall, and antispyware products, if for no other reason than to protect your computer.
As Leo points out, “have the attitude that someone is watching you and only do stuff you don’t mind being watched doing. Use encrypted email. Use SSL email (https://gmail.com). Or, just don’t check it. But the best way is to work through a VPN. Hotspot VPN is a good one. $10 a month.”