DO NOT USE ON SSD DRIVES! While RollBackRx works a lot better than system restore (with features like rolling back in under a minute to being able to rollback at boot before windows even loads) it does have one massive drawback: SSD drives. i booted up to find RBRx defragmenting my SSD - not a TRIM a defragment. This all happened in the boot phase before Windows was even loaded so it was not possible for the Windows Kernek to manage what was happening to the drive. Documentation gives absolutely no help to find out why a defragment is needed on an SSD (i suspect it is not but the software doesn't differentiate between SSD and HDD.