[Mr. K]

Make sure you have
1)Avast Anti-Virus
2)MalwareBytes
3) CCleaner

AND USE THEM!

They are all free for home use and are the best

If you get one of these ransomware threats immediately shut off the power on your computer- it usually stops it from doing any damage and you can reboot normally

DONT CLICK ON ANYTHING

[Red Badger]

Add to that Glary Utilities......................

http://www.glarysoft.com/

[sparklite2]

Another must have is SpyBot.

[Ingtar]

I just use ESET and common sense.

[Qiviut]

May I also suggest:

CryptoPrevent

To read more, here is very informative info: CryptoLocker Ransomware Information Guide and FAQ

I do not know if this new ransomware operates the same way, but I'm guessing maybe it does in which case CrytoPrevent (there is a 'free' product) would be useful to have - I run it on my computers after a relative's business got ransomware (put them down for a week) & someone I know got it on their personal computer.

It is my understanding that if your backups are connected to your computer, they will be encrypted as well.

From link:

When you discover that a computer is infected with CryptoLocker, the first thing you should do is disconnect it from your wireless or wired network. This will prevent it from further encrypting any files. Some people have reported that once the network connection is disconnected, it will display the CryptoLocker screen.

[Bob434]

Better Yet Mr K is to have a robust GoBack system like rollbackRX

Virus hits? Do a rollback before windows starts up, virus is completely gone and you are back up and running

[G Larry]

and for Mac’s?

[Birdsbane]

I opt for Comodo Internet Security (Disable the “Sandbox”).
Malwarebytes, Super Antispyware, Glary Utilities, and Norton Utilities. All Free and I never get infected, except for the ever present tracking cookies. No utility program is all encompassing. An arsenal of them is required to get most everything, and even then, I have yet to find one which will delete the ever growing .dat files (index items).

Glary Utilities has the fastest defrag program I have ever used.

[Birdsbane]

I opt for Comodo Internet Security (Disable the “Sandbox”).
Malwarebytes, Super Antispyware, Glary Utilities, and Norton Utilities. All Free and I never get infected, except for the ever present tracking cookies. No utility program is all encompassing. An arsenal of them is required to get most everything, and even then, I have yet to find one which will delete the ever growing .dat files (index items).

Glary Utilities has the fastest defrag program I have ever used.