It happens a lot and given the thousand viruses a day (it's more than that) that must be added to the system it's going to reach a point that all apps will likely trip some antivirus trigger.
Microsoft and others want to move from an open ecosystem to a walled garden which is your choice.
Back to Eden?
I downloaded FreeFileSync from CNET with some trepidation because several reviewers indicated that there was a virus "trojan.maljava!gen24" in the program. Before installing this program, I ran malwarebytes, avast and avg on the downloaded file. None of these three found anything suspicious so I began the installation and part way through this message popped up "Software Installation. The software you are installing has not passed Windows logo testing to verify its compatibility with Windows XP
Continuing your installation of this software may impair or destabilize the correct operation of your system either immediately or in the future. Microsoft strongly recommends that you stop this installation now and contact the software vendor for software that has passed Windows logo testing." I am not sure how to contact the vendor about this issue and is it as important an issue as Microsoft indicates? It would seem to me that if over 36000 downloads have been made of this program at CNET if it were creating problems for Window XP users there would have been much feedback to CNET. I always try to set a restore point before installing any software.