I had this same problem. The issue was McAfee Real Time scanning. It would find a virus in one of the Roon files at every launch of Roon 1.8. I never could find the file in Roon that McAfee complained of to make a virus exception in McAfee. My solution therefore has been to turn off McAfee Real Time Scanning every time before I launch Roon. Once Roon is launched, I turn back on McAfee Real Time Scanning and both Roon and McAfee work normally thereafter. Hope this helps.