Simplified Steps to Recovering Outlook Data
" One of the most common causes of corruption in a PST file is an oversized PST file. Older versions of Outlook have a size limit of around 2GB on PST files and if a user allows the PST file to go beyond this limit, the PST file gets corrupted almost instantly. There is no warning to the user about the file size approaching the limit of 2 GB and the worst part is you cannot predict what data might be lost due to the corruption. Outlook does provide a Crop utility using which you can remove some of the data so that the PST file is brought down to under 2GB and you can recover pst data. However, you cannot control what data is cropped. A more effective alternative is to use specialized third-party tools such as Advanced Outlook Repair from DataNumen to repair the PST files so that there is no data loss.
" Outlook PST files are also susceptible to virus attacks, sudden power surges, hardware malfunctions and problems in software. All these can cause corruption in Outlook. If the corruption is not serious, then you should be able to run Outlook tools such as Inbox Repair tool (scanpst.exe) to scan the files for errors and then fix them. If the corruption levels are fairly high then it may not be possible to use the Inbox Repair tool to repair the errors and you may again have to turn to Advanced Outlook Repair to fix the PST file and recover pst data. This tool uses advanced technologies to scan the damaged file and recovers Outlook items so as to minimize data loss.
" Another reason why PST files may become corrupt is because of version upgrade. When a user upgrades the version of Outlook being used, the PST files currently being used may not be supported by the newer version and this makes the file inaccessible.
As you can see, errors in Microsoft Outlook are quite common and are very often revealed at startup since that is when the personal folder is scanned and checked for any errors. Errors that cannot be fixed using the standard tools can be very frustrating but by keeping Advanced Outlook Repair handy, you can very quickly fix these errors and have Outlook working again.