Hello,
There is many way to check if it is AACW which keeps memory and processor busy.
The first is: just after windows start, close every softwares (except Windows
), start the Windows Process Manager, look at the performance tab (Take a snapshot), start AACW and close it when you are in the main menu.
Look again at the performance tab (Take another snapshot).
Search for big différences.
If there is nothing, retry again but before closing AACW, play a campaign.
If you see some big differences, send us your snapshot and your log files, I will look at it.
Don't forget to update the game before !