Description: Get the maximum performance from your Windows desktops, laptops and notebooks. PerfectDisk 11 Professional is the most comprehensive disk defragmentation and optimization utility available. Its innovative features keep your PCs running like new. This award-winning solution speeds up web browsing, video/photo editing and music downloads. It’s fast, easy and keeps your disk in top shape automatically. PerfectDisk 11 Pro is Microsoft Certified for Windows 7, Vista and XP.