My laptop contracted a virus this week that destroyed Months and Months of labor-intensive file downloads and/or modifications...I'm taking it to the 'laptop doctor' this weekend for a diagnosic evaluation, which may boil down to a complete wipe of my harddrive and reinstalling Windows 10 OS...so I figured that since some of you have already had this situation, you might recommend some anti-virus software that seems to work best with MSTS Train-Sim and does not tend to block downloads...I am FULLY open to suggestions and/or experience(s)...thanks! Bill