If avast blocks a program, it's probably for good reason. If I know with 110% that the program is clean, then I can simply disable my shields for 10 minutes.
Tbh I've never had problems with avast blocking something it shouldn't.
Please show me where in avast you choose a setting of block or quarantine.
-- 10 Feb 2013, 06:28 --
I think you're applying some things from spyware removal tools (e.g. ad-aware) where a specific malicious item has the option to be removed or quarantined. You're mixing anti-virus and spyware scan/removal tools.