Положите два окна в одно

You can't put multiple applications into one taskbar icon. But you can change when the taskbar groups the icons. AS for two windows on the same screen just drag the window to the edge of the screen and drag the other window to the opposite side. If you have dual monitors just hit windows key and either the left or right arrow key. This will snap the applications to the side of the monitor instead of the edge of the desktop.

To change the taskbar grouping behavior: Right click the taskbar > click properties. From the taskbar tab under taskbar appearance go to the taskbar buttons drop down and select one of the following options:

• Never combine -- Will do exactly that Never combine the taskbar Icons and all windows will have there own button on the taskbar.
• Combine -- When taskbar is full will keep the Icons on the desktop separate until more room on the taskbar is needed. It will then group the Icons based off of applications.

• Always combine, hide labels -- When this option is selected the taskbar will always group the Icons on the taskbar by application.

  The Best you can do is to group the icons all the time. This will never combine multiple applications in one taskbar button.

If you really want to go overboard you could start up a virtual machine and have the two applications started up on that and sitting there waiting ready and just switch to the VM when you want to pull up both applications.

look at the accepted answer here, the links provided may work.