Only AVAST, no AVG You try on free
https://www.avast.com/ Screenshot
http://imgur.com/gMZzKrxStoned.2(b) is a malevolent Trojan horse that that often makes use of system loopholes and Internet vulnerabilities to break into the targeted computer and damage the whole system.
Stoned.2(b) uses your network connection to download additional malware onto your system. This Trojan horse also opens a backdoor in the system, which allows the remote hackers to visit your computer and do whatever they like in it. Moreover, it will install a key logger in your system in order to record your keystrokes and send that data to a specific server. As a result, your confidential information such as online banking account usernames and passwords will be revealed to the unscrupulous hackers. Network security is what I do for a living. 99% chance you have a false positive. AVAST used to be good software, but you can say that for a lot of anti-virus companies. These days I consider AVAST to be crap-ware.
To get a realistic appraisal try running it through
https://www.virustotal.com/, or
http://www.herdprotect.com/ (a few positives do not make it a virus).
For personal use I still like Malwarebytes the best, and run it in combination with Panda Cloud Free.
Never had any issues with SDC. Always make sure you download from the official source, because it is possible that someone might put an infected version out there.
Just for grins I ran my blk0001.dat through the latest version of Malwarebytes and Panda, and it comes up clean. I remember back in the day, all the mining software I used to run came up as a false positive, so I'm betting it's just another flaw in AVAST.