OS X Mavericks recently went bonkers, and kept asking me to key in the keychain password from the moment I started it up. No matter how many times I key in the password, it would say that it was the wrong password (it was the correct one, you dolt!) and it kept asking me again and again and again like a really neurotic girlfriend.
I tried using resetting the password but that didn't work. It still claimed that the password was the wrong one. I tried using the Keychain First Aid to verify and repair the keychains but it only reported that everything was perfectly okay when it was obviously not. The good news is - I finally found the reason for this problem and its solution and it's stupendously simple.
Business software left the office and moved into the home long ago. If you've ever lost the password to Word, ZIP or PDF file in misguided attempt to protect data from prying eyes, this guide to Decrypting Document and File Passwords is a life saver. PCSTATS Tips