I have two PCs in one room, one is the family's (1st) and the second one is the one I use for gaming (2nd). Everytime my sister turns on the 1st PC, the 2nd won't let me put my password because it crashes right away, or if I already have the 2nd PC on, if I turn the 1st on, the 2nd crashes. I couldn't fin any information about this because it seems like nobody has this problem. I'm thinking of reinstalling windows. Any help? It's a windows 10 by the way.
I tried everything I knew, but it's worthless. I appretiate all help. I'm sorry if my english is not good at all, I'm still a student and english is not my main language .