CRC (Cyclic Redundancy Check) errors on pst-file

CRC (Cyclic Redundancy Check) errors are indicating errors with a specific file and in lot of cases with your harddisk. It doesn’t indicate a problem with Outlook itself but a problem with the place on the harddisk where your pst-file is located. When this occurs after you have just copied the pst-file (on disk, from network, from CD, by download) you should first verify that the original source still works and try to copy it again. If this has happed “all of a sudden” like in that it still worked yesterday the issue can be either software based or hardware based.

If it is software based you can fix it by opening Start-> Run;
chkdsk c: /f (replace c: with the drive letter on which your pst-file is located)

When it tells you that it currently cannot check the disk and asks you if want to perform a diskcheck at next reboot choose Yes (Y) and reboot your computer.
When you are done run scanpst.exe against your pst-file to check if this fixed it.

When it is hardware based you are probably going to find Disk Errors in the System log of your Event Viewer. You can access the Event Viewer by going to Control Panel-> Administrative Tools-> Event Viewer

Unless you’ve got a really old harddisk and/or motherboard they will probably both support S.M.A.R.T. You can then install a utillity that monitors your disks health. I use SpeedFan for this as it is free and it does also monitor your systems temparature and fan speed (wow, where would that name come from?). You can download it here

Most common attributes that are shown here and their meaning