Click on the Start button. Type magnifier in the search box. Click on the Magnifier application to open it. When the Magnifier application opens, your screen will be zoomed in. Click the magnifier icon and then the round "-" button until you've fully zoomed out.   Your colors will be inverted. The options for the Magnifier do not change if you close the application, so you will only need to do this once. Right-click on the Magnifier application on the task bar. Click Pin this program to taskbar. You'll now be able to invert your screen colors by right-clicking and choosing Close window to restore the colors. To transfer them back to their inverted state, click the Magnifier icon once.

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Write a summary of the previous text in Vietnamese:
Khởi chạy Magnifier. Thu nhỏ (không bắt buộc). Nhấp vào bánh răng màu xám để mở "Magnifier Options" (thiết lập). Tích vào ô vuông nằm cạnh dòng chữ "Turn on color inversion". Nhấp OK. Ghim ứng dụng Magnifier vào thanh công cụ.