First of all, i apologise for my lag.
Well, my pc gives me no more than 15 fps when my vcmp runs on full screen, for this, i use windowed mode, it somehow gives me 30 fps but with this, it becomes so hard to take headshots.
So, i oftenly play with windowed mode but with you, i forgot to make it windowed (small), that's why it happened, plus my father barely gets me anything.
Sorry. I'll take care next time.