PerfectDisk 13 Service Pack 4 (Build 843) has been released, which adds the ability to exclude files approaching the FAL maximum size from defragmentation operations, adds vSphere 6.0 compatibility, and fixes a Log Viewer sorting issue. Read More: What’s New in PerfectDisk 13 SP4 (Build 843) Update PerfectDisk There are two ways to update existing installations of PerfectDisk 13: Run PerfectDisk, click Help and then select Check for Updates to immediately update to SP4. Or download the update for business editions of PerfectDisk manually