Have no idea why but even changing the branch causes so damn a lot of pain. I have to double click at least 4-5 times to change the branch as I'm getting the error:. I just wander why is it so hard to have a queue for running git tasks to avoid even in a theory possibility yo have 2 git processes running in the same time. Grrr, really annoying. Feel free to contact me, and I speak russian git -c diff.mnemonicprefix=false -c core.quotepath=false checkout master fatal: Unable to create 'C:/Dev/Cati/.git/index.lock': File exists. Another git process seems to be running in this repository, e.g. an editor opened by 'git commit'. Please make sure all processes are terminated then try again. If it still fails, a git process may have crashed in this repository earlier: remove the file manually to continue.