I used to use spybot and adaware, both very good and free, now use KASPERSKY, way better, so smooth, and don't need to do a thing.
I go on porn sites doing "research" all the time, never a problem, but it does intrude on some sites that it thinks may be dodgy, even some that are obviously not, so occasionally need to turn off temporarily.
Cost me £60, enough to do 3 compys, for a year.
tabetha