Running a different browser mightn't be a bad idea either. Owing to others on the home network I run Norton (cheap 3 pc deal <£20) and when that expires then whatever is cheap (but NEVER McAfee as I hate the adverts and tricky auto renewal, and I am just prejudiced against them from past experiences, and ZA hates too many programs).
If it wasn't for these others on the network, I would take the free route too.