Make sure you back up ALL your files, photos etc and make backups of of your family tree maker file to another location for example: the cloud, another drive, a flash drive or external hard drive before making any changes to your pc.
Personally, I didn’t lose any files and none were corrupted but you should be doing the above action on a regular basis anyway as any windows update/ virus infection/ hardware failure can cause serious issues unexpectedly. Many people make two sets of backups especially for very important files.
