Failure in consisting dual monitor in windows 10

I have question for setup dual monitor in windows 10.

Last time i could use dual monitor but as i am remember, after i coect my laptop to project, i can not use LG and Dell monitor as second monitor anymore but Samsung monitor works.

I have deleted "HKEY_LOCAL_MACHINESYSTEMCurrentControlSetEnumDISPLAY" via regedit, because i thought there is something wrong which affect bad influence on setting up dual monitor.

But i still have same issue. Can anyone help me how to fix this issue?