For Windows XP, DiskGenius is the most complete all-in-one solution. The free version handles partitions up to 2 TB and recovers files; the Professional version adds virtual disk support and advanced backup.
Windows XP’s Disk Management console is limited: it cannot shrink system partitions without third-party tools, nor can it convert between MBR and GPT without data loss. DiskGenius handles these tasks effortlessly. diskgenius windows xp