Re autocad I have no idea as have not got it to try though to create an exclusion go to WEB AND EMAIL PROTECTION/firewall/Internet connections for programs and allow the autocad executable. Tick net Guard as well for the file as on.
I assume you do have the home version not enterprise if so it is in a different area and I need to move this post
Though I see on the autocad forums this suggestion
Thanks for the reply. I have found this is a McAfee AV scanning issue. I have contracted McFee a fewl times will no luck. I must turn off "real time scanning" within McAfee and ACA works fine
Of course if you do this reenable it asap after you finished
Another suggestion was have you used a registry cleaner recently?