CRC (Cyclic Redundancy Check) is a general technique used to implement data reliability. Basically it is a function used to detect any changes to the data that are used across a network or any storage devices. MS Outlook performs CRC check each time when you open the PST file. When you encounter any errors while accessing PST file then it indicates CRC error with your PST file or with the hard disk where the PST file resides. If the PST file is corrupted due to CRC errors then it needs to be restored from the recent backup. If there are no backup files, then it is necessary to use a third party application such as PST repair program to fix PST file.

If there is a CRC error, then the error message prompt on the screen is “File path/file name.pst could not be accessed. Data error. Cyclic redundancy check”. Main causes for CRC errors are:

Whatever may be the reason for CRC error you can successfully fix PST file with the help of CRC repair tool. This application repairs PST files created on Outlook 2000, 2003, 2007,2010,2013,2016. It also supports OST files. PST file created on Outlook 2000 gets corrupted if the file size exceeds 2GB. Such files can be easily fixed with the help of tool used repair PST file bigger than 2GB. Repaired files are generated in 2003-2010 formats which make importing easy. This utility not only recovers email messages but also recovers meeting requests, contacts, appointments, RSS feeds, tasks, journals etc. It provides real-time preview of the repaired items through Outlook style browser view. Password protected and highly encrypted PST files can also be easily repaired with this application. This tool is equipped with advanced features to repair .pst file Outlook 2010 which gets damaged due to above-mentioned scenarios. The archive PST files are used to divide the emails between various files so that managing the data becomes easier. Corruption of archive files results in severe data loss in such cases use PST recovery tool which can fix Outlook archive PST files.

Apart from such unexpected errors, sometimes, you might be deleted important emails accidentally. You can use "Recover Deleted Items" option in the Outlook 2007, to restore all deleted emails. But what if you have deleted them from the "Deleted Items" folder too? Then the only option left for you to get back deleted emails from Outlook 2007 is usage of third party tool i.e. PST repair program. Go through this link to know more

This software is not only used to repair PST file but it can also supports to repair OST file. Using this software, you can fix corrupted or inaccessible OST file. It can allow you to fix OST file in Outlook 2003, 2007, 2010, 2013, 2016 etc. If you want to fix OST file in Outlook 2007, then you can visit -

Steps to fix PST files:

Follow these steps to fix corrupted PST files

Step 1: Download and install the utility from the site. Launch the utility and select “Open PST File” or “Find PST File” or “Select Outlook Profile” based on your requirement.

Step 2: Browse and select the damaged PST file which should be repaired and click “NEXT”.

Step 3: Select either “Normal scan” or “Smart scan” option based on the severity of damage of pst file. If the PST file is severely damaged then go for smart scan option if not work with normal scan option. Click "Repair" to start repairing process.

Step 4: After the completion of repairing process window containing the count of the emails, notes, calendar, tasks will be displayed. Fixed PST file will be stored in default location if the destination location is not specified.