Avast often blocks a malicious URL but not the download.
Avast should fix that issue.
This video shows what i mean. It is from rynesandbergfan23(youtube).
http://www.youtube.com/watch?v=nhBarGLCT30&list=UUlbIm1RGcH9d9Tj0Xtj87OA&index=2
Watch from 5:00 during the test you will see it several times.