Some time you are used only one yahoo messenger but you have two id for yahoo. If you want same time are you login in yahoo messenger. Again are you install yahoo messenger it's not possible so what to do you have any idea now forget it just follow this step. . . . .
1. Now install yahoo messenger and already installed that's good.
2. Press Window + r open run type regedit .
4. ON the Right side if the page Right click and choose new Dword Value.
5. Rename it as ` Plural `.
6. Double click and assign a decimal value of 1.
7. Now see the magic close registry and restar yahoo messenger and try Multiple Login.
