Yes, this North American model does come with a dual voltage (AC 120/230 V (50/60 Hz) ) AC adapter. You will need to use a wall side plug adapter to use in Europe.

No, this is a North American model. There is a limited 1-year manufacturer's warranty that is valid in North America only.

That will depend on the requirements and compatibility of the game. We recommend you check with the game's software publisher web site for their compatibility with the Windows 10 Home 64-bit operating system and the minimum/recommended hardware requirements to run their program, then compare these requirements/compatibility with this system's configuration.

This system should provide good speed with its AMD A9 processor and 4GB of RAM.  Be sure any software you installed is compatible with Windows 10.  There is no need to install Microsoft Office software.  The software is already part of the operating system, you just need to activate the software with a purchased product key.  If you have installed a copy of Microsoft Office, this is conflicting with the existing copy on the system and this will slow your system down.  If you have installed a 3rd party anti-virus program, be sure that Windows Defender is turned off and that the trial version of McAfee Anti-Virus software is uninstalled.  There can only be one anti-virus program on the system.  You may need to restore your system to original factory default settings if any of the programing errors have occurred.  You can do that by typing "restore" in the Cortana search window.  Just click on the magnifying glass icon at the bottom left of your Windows 10 Desktop.  Click on "Reset This PC"  Then click on "Get Started" and follow the on screen directions to restore to factory defaults.