This page can show you how to verify which version of Windows your MJUSD computer has installed. There are two versions used in the district, Windows 7 and Windows 10, and they each have different stylistic themes to tell them apart. Here are side-by-side comparisons:
On Window 7, you are required to press CTRL + ALT +Delete before being asked for your password.
On Windows 10, you are required to press any key before being asked for your password.
The Windows 7 start menu button in the lower left corner is multi-colored.
The Windows 10 start menu button in the lower left corner is mono-colored.