A trojan named
Obfuscator.XT encrypted my Outlook.pst file (Outlook 2003) to a file named
locked-Outlook.pst.oldv in the same directory.
What can I do to decrypt the file?
I found a program that unlocks encrypted files from trojans. It was not designed for that particular trojan but worked.
It can be downloaded here (ScareUncrypt) and does NOT need a reference unencrypted file to generate a key.
By the way there were a lot more files encrypted than just the Outlook.pst.