PrivacyAssistant Professional - description from Softdepia.com:
Stop friends colleagues, spouses and digital thieves from snooping around through your private data! Keep all your sensitive data in a secure environment - you only have to remember ONE password and you can be sure your data is safe! PrivacyAssistant Professional also lets you crypt any file in your computer - right from your Windows Explorer!
PrivacyAssistant Professional is a "Free to try" program. You can download and try it for an evaluation period.