New
#21
I would not use ZoneAlarm crapware as we see nothing but problems with it here for three years since before Win7 release.
Use Microsoft Security Essentials with Win7 Firewall kept updated by setting Updates to Automatic, treating Recommended same as Important.
Use Malwarebytes for on-demand scanning, or add it's Real Time Protection if you're prone to infection.
Keep UAC set to highest setting in Control Panel>User Accounts.
Keep your browser-related security patches updated regularly with Free Online Computer Scan - Online Software Inspector (OSI) - Secunia.
You will have much better performance by taking the time to get a perfect Clean Reinstall - Factory OEM Windows 7 and sticking only with the methods and tools in the blue link.