Many users dont think about the safety of their computer at all. Others have an anti-virus program installed and feel thats enough. More concerned users might be changing passwords regularly and encrypting as much data as they possibly can.
yes, probably because not everyone has valuable data on their computer, so they do not really think about the security of their data.
I see IDM has a good rating on ICO Bench. did you schedule your ICO to last for 4 months?