So, I had tested the core affinity , then you noticed that mask affinity.
I'm fixing other issues:
I changed the page file.
Removed the mods
I'm using other missions for now.
I disabled the tacview at special menu settings.
However, the 100% of usage core 1 still ocurring , but, i have observed that these issue only happen when i'm using the DCSMT.exe and not the dcs.exe , the MT version has more performance in all tests i've performed even thoug that the dcs.exe show that you are using MT.
Notes:
My pc is freezing completely in 2d mode and when i switch to the destop to use the chrome for example. (only in MT executable)
I ran the cleanup and rapair on the launcher.
dcs.log