Do you use CCleaner for Windows? If so you need to update the software, a recent version was hacked and a backdoor tool was installed into it that allows for download of further malware such as ransomware. You can read more in this Forbes article
It is important to have a layered approach to security these days. Talk to me today about Anti-Virus and Web Protection products to protect your computer and Managed Online Backups solutions to protect your data in the cloud.