The GetSafeOnline site is back up and online, and I urge you to visit the site and check whether or not your computer is injected with CryptoLocker or Zeus by downloading and running their malware removal tools.
https://www.getsafeonline.org/news/we-have-short-time-to-beat-powerful-computer-attack/
Even if you have up to date anti-malware / anti-virus software, you could still be infected.
Even if you don't think anything is wrong and you haven't visited any suspicious websites or clicked malicious files in emails, you could still be infected.
If you use any version of Windows, run the tools and run them now.