Just replace the Claymore miner with a new copy of it. It was a Windows Defender attack that disabled the Claymore miner. If you are not going to dual mine, use the 10.6 version of the miner since it does not seem to be recognized as a virus when you download it.
windows defender spotted goddam trojans and malware in your Zip File!
winbit coin trojans!!!
I had this or something similar but the system did find one (trojan) but cant find the log to see which one it was. on Sunday around 6pm est. I restarted computer and the command prompt box flashes once when I start the miner.bat file (that's what I names it) and wont restart.
(My miners been running months without an issue, just to note)
Today I am going to trouble shot what I find out here. I removed/reinstalled driver (block-chain-AMD), removed the claymore software, ran two virus checkers, reinstalled claymore from clean flash drive & I had win defender off while I installed fresh programs.
One thing I did notice in the event viewer was a lot of logins & disconnect type 3,7, maybe a hack attempt ? not sure what to look for but that's what it looks like.
My other miner is still online.