TestComplete and TestExecute performance problem

I've tried to run the same project on both machines without any history in logs. In my case it doesn't matter whether I have or not have any logs in project - the result is the same and massive delay in test execution is visible. Moreover on machine where problem doesn't occure more processes are running, including antivirus application and it works much faster. I will try to reinstall everything on this machine including OS and I let you know if it helps.