Free guides
Guides to fix Outlook and Thunderbird problems
Step by step for the most common cases, starting with what's free. Each guide explains why the problem happens and how to keep it from coming back.
Outlook won't open: how to recover a corrupted PST file
Outlook won't start and says it cannot open the set of folders? Find your PST file, try Microsoft's free repair tool and recover your email without losing the original.
Read the guideScanPST didn't work: what to do after the Inbox Repair Tool
ScanPST froze, found no errors or deleted emails? Learn the limits of the Inbox Repair Tool and how to recover the PST safely.
Read the guideOrphaned OST: how to recover email from an account that no longer exists
An OST is the local copy of an Exchange, Microsoft 365 or IMAP account. Learn when you can simply download everything again and how to recover email from an orphaned OST.
Read the guidePST too large: how to deal with Outlook's 50 GB limit
Outlook data file full, slow or no longer receiving mail? Learn the PST and OST size limits and how to shrink or split the file without losing email.
Read the guideCorrupted MBOX: how to recover email from Thunderbird and Google Takeout
Messages vanished from a Thunderbird folder, or the Google Takeout MBOX won't open? Understand the MBOX format and how to recover and convert your email.
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