If there’s an annoying thing in Git for Windows is that damn password request you got at every fetch, pull or push.
To avoid to waste your time typing passwords (you are not a SysAdmin, indeed :)), there’s an useful little program called git-credential-winstore that allows you to store and retrieve passwords when needed using the default Windows Credential Manager:
You can download this little gem from Codeplex: gitcredentialstore.codeplex.com; it requires .NET 4.0.
To get it working, put it in a folder of choice and run it; it hooks your Git installation looking for Git path in the PATH environment variable, then it comes to action the first time Git will require to access to a remote repository.
I have to say that this simple download-and-run-it solution worked well only one time on all the machines I tried to install it; to settle things once and for all, now when in need I use Chocolatey package to install it:
C:\> choco install git-credential-winstore