To restore a corrupt SQL Server backup, follow these steps using Aryson SQL Backup Recovery. First, install and launch the software on your Windows system, ensuring antivirus programs are disabled and you run it as an administrator. Next, select the corrupt .bak file you want to repair; the tool also supports split or compressed backups. Choose a destination folder to save the extracted files. Click Extract Files to start recovery, then preview the database details like tables, views, triggers, and functions. Finally, click Save to recover MDF and LDF files, which can then be used to restore your SQL Server database. Dual scanning modes ensure both minor and severe corruption is handled efficiently.