Unlink of file Failed. Should I try again?

This could mean that another program is using the file, which is preventing git from "moving" the file into or out of the working directory when you are attempting to change branches.

I have had this happen on Windows Vista where eclipse is the program "using" the file. The file may not be actually open in eclipse but may have been opened by a process run by eclipse.

In this event, try closing the file in any applications that might have used it. If that doesn't work, completely exit any applications which may have opened the file.

I had this issue and solved it by the command : git gc The above command remove temp and unnecessary files. (Garbage collector.)

this solution from here worked for me:

This is a Windows specific answer, so I'm aware that it's not relevant to you... I'm just including it for the benefit of future searchers.

In my case, it was because I was running Git from a non-elevated command line. "Run as Administrator" fixed it for me.