I’m currently under avast 8 + windows 8.
Since few weeks now, avast slows down my web surfing, pages hangs a bit when opening new links and youtube videos are slow and jerky few secondes at start before being read correctly.
When I stop avast surfing is OK, and smooth.
I tried to reinstall it but still I have the problem, same thing when I disable web protection, using chrome and firefox.
I don’t think it’s related to my PC, my PC is pretty new 3GHZ, 4 threads, 4Ga Ram etc… Windows 8 64bits
it really comes from Avast, currently I’m with Avira, until I find a solution.