Thank you for letting us know about this problem that you have encountered. Apologies for the inconvenience that this has caused you.
About this possible ransomware false positive, we suggest to upgrade the Trend Micro program on your computer to the latest version as a part of initial troubleshooting. We were able to check your records here from our end and it shows that you still have the previous version. With that, please check the article below for the instructions on how you can install the latest version of Trend Micro Security on your computer.