So after installing windows i started mining .. everything fine, later on i reboot the computer ... 11.9 claymore just disappears... at the line Main Pascal pool is pasc-us............. then gone, no error no log.. i disabled defender.. nothing, i added it to exclusions just incase,. group policy disabled it. I uninstalled drivers for my two 1070 cards and installed. nothing i tried v11 - 11.9, same thing.
When you say "i tried v11 - 11.9, same thing" do you mean that Claymore disappeared completely - all files and folder gone ? Or just the *.exe file missing ?
Check you don't have some other anti-virus app running and deleting EthDcrMiner64.exe.
Build 1803 of Wndows 10 not work with Claymore for some folks, try rolling back to build 1709.
Everything stays , just the mining window disappears.
that's all i get from any version. It a new windows install with defender removed. It is 1803 tho. But i worked when i installed it.