Many-a-times, due to the occurrence of situations like broken PST, file size limitation of PST, file header corruption, virus attack, etc. the PST file becomes corrupt. Resulting from it when you try to open the PST it pops up errors like ‘An unknown error has occurred- 0x80040119’, ‘An unknown error has occurred. 0x80040600’, etc. In such situation, to recover the file you will need to perform Outlook PST recovery.