If your PC display shows inability to display a folder or a runtime error 713 or 1931 or else if it shows inability to update the system file through window installer service, you can gauge that your PST files have just become vulnerable to corruption. There can be many other clues.  An error can be afloat which declares that no data file filename can be displayed or that the outlook cannot open data file filename.

All this can be caused due to various problems. Human interference without adequate know-how or the invasion of spam wares or mal wares can cause the trouble. Moreover it may be that the damage has been done due to multitasking while performing a compact.pst operation. The chief wrecker is found to be overloading in many cases. Once we take the PST files beyond the threshold load of 2GB, it reacts by rendering the Microsoft outlook unusable.

In such cases the outlook starts to operate very slowly and moreover freezes down. All its programs begin to waver and open very slowly. It is also important to note that in such an event the problem compounds if we shut down the machine. PST repair can be done through various methods so it is highly possible to recover data in case of PST file corruption.