aVAST freee - UPDATING

I just finished with Zonealarm. Had permanently problems with updating. The excuse was our slow internet (only 1.2). Is there a guarantee that this would not happen with avast? Thanks a lot

Though Avast updates are small no one can guarantee anything, best thing to do is test for yourself.

If you buy a car, is there any guarantee it will drive a year without problems ?

Make sure everything from ZA is removed or it can cause conflicts with avast.