To begin, press the Start button and select RUN.

Type in {Regedit}.

Then press ENTER.

This will load the registry editor.

Locate HKEY_CURRENT_USER.

Press the + sign next to HKEY_CURRENT_USER.

It will expand showing several sub keys.

Locate the Identities key and press the + sign next to Identities.

A list of {GUID} keys will show.

These consist a series of letters and numbers enclosed in braces.

Example: {AFE1AA0D-D202-4C52-AC8D-F68DE06421C1}

Click on each {GUID} key in the left window pane.

Look in the right window pane for the Username string.

This will show you which {GUID} belongs to which Identity.

Locate the Identity you need to remove and click on it's {GUID} key.

Press the Delete key on your keyboard to remove it.

Exit the registry editor.

The Identity has now been removed.