You can repair corrupted OST files using Softaken OST Recovery Software. If the OST file is severely corrupted or cannot be fixed, this software can help recover and repair it, making it usable again. Additionally, the software can retrieve user emails and attachments in HTML format. It's important to have a backup of your OST file in case of corruption. The software is compatible with all Windows and MS Outlook versions, maintaining the original folder layout and email format during import and conversion. It also provides a free demo version of the software.