It takes me multiple clicks to destroy 1 block in creative mode

I can't destroy any blocks without clicking multiple times in creative mode. I tried switching versions, but no luck. It usually happens when I'm closer to blocks, but sometimes when I'm in normal range of them. I have just recently updated my Windows to a Windows 8.1 (I think) as it was mandatory. I can also not middle click blocks, because it either does nothing, breaks blocks, or places them.