Right-click and select "Extract Here." The software will automatically pull data from Part 2 to complete the file reconstruction.
Always verify the source of such files, as split RAR archives from unofficial sources are common vectors for malware. 23.5.1.724.X64.part2.rar
Large professional creative tools or CAD software installers. Backup/Recovery: Split backups of system directories. Right-click and select "Extract Here