How to upgrade Git on windows?

I'm currently running git version 1.8.0-preview20121022 on windows 7. I'd like to upgrade to the current latest version 1.9.4-preview20140611. I downloaded the installer Git-1.9.4-preview20140611.exe and ran it. It complains that I'd need to close Windows Explorer:

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Clicking next just brings up an error. How am I supposed to upgrade git? Am I supposed to open the task manager and find that pid and kill it? Also my existing git installation is not in the standard program files folder, is the installer going to ask where I want to install git (so far it hasn't)?

Solution

First - reboot. You just may have a rogue run-away explorer process. It is, however, a tiny bit safer to reboot than to just kill it by its PID IMHO.

If that doesn't help - log into Windows with your admin user. With any luck it won't have the shell integration running and will not have the needed files in-use. Install your new GiT from that admin account.

If that still doesn't help... Time to use the "kill by PID" way and force your way through!

Good luck :)