Ray,to me it sounds like a conflict with another piece of software.Im guessing its a program you hardly use,maybe once a week or similar.
Have you tried eliminating certain programs from your startup ? as this could be the cause.
What is ransomware and how do I protect my PC from WannaCry?
What I learned from my mentor, Oscar-winning VFX supervisor Phil Tippett
Siri vs Google Assistant
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