I purchased deltawalker some time ago for my mac. I decided to install it on my pc and update it on my mac.
While trying to update the software avast displayed the alert on the pc.
At first I though my niece managed to install malware despite my defenses when she used my pc so I scanned all my systems with ~10 different scanners for virus or malware on top of what is instructed in this forum.
For a partial list see: hXXp://www.technobuzz.net/10-best-free-online-virus-and-malware-scanners/
Everything came out clean and avast didn't trigger the alert for anything else making me think the site is infected with malware BUT...
At work computers running Symantec end point protection (neither my pc or my macbook pro) didn't trigger a similar alert either with browsers or the same recently installed deltawalker.
At which point I'm thinking maybe my system really has malware installed so I decide to install avast on my mac at home and try out the website which also didn't trigger the alert.
I'm assuming avast is using the same signatures and appropriate heuristics on the mac.
Right now I'm unconvinced either way because I cannot find any evidence of malware on my pc. I also can't trigger the same alert using avast on a mac and also can't trigger alerts on similar systems using another solution like Symantec.
I believe I need an independent assessment to look at my logs and see if I missed something or that could explain what might be going on.