I switched from Windows 7 to Windows 8 with a fresh install. After install all my apps, every time that I log in into Windows two Chrome instances are launched. One is for the GTalk plugin but the other one opens a new Chrome window. This is annoying because sometimes the new window is opened after 3 minutes. How can avoid this to happen?
You can disable the program from the startup programs list. Search for and open the task manager and click on 'More Details' and then the 'Startup' tab. Disable Google Chrome or the Gtalk plugin whichever one you don't want.