Thanks for your comments and help.
I am wondering about a clash too, but found this...
"There is NO Anti-Virus software on the market today that provides the same type of protection that CryptoPrevent provides, it works in an entirely different manner.
Since the two can co-exist on the same PC peacefully, and CryptoPrevent’s protections do not utilize any system resources, why not utilize both methods of protection?"
"I do however have a robust backup and recovery strategy, taking exact image backups of my drives weekly."
How do you do that DavidR?
I'm afraid I'm one of those 99.9% of users Eddy!
Learnt something today....