AntiVirus and Firewall are controlled by group access policy that I don't have access...
You have PC which is part of Corporate Network?
In that case We'll have problem to investigate this, probably you'll need to talk with some guy from your IT department.
Is't possible to you make and post some screenshoot of mentioned message ("Your computer is at risk, Anti-Virus Protection needs Attention and Firewall is Off") ??
Also please post new HJT log.
Regards,
S.