What caused the small icon of the window to become garbled

Q: I am using the computer due to power failure, causing abnormal shutdown. After restarting Windows XP, I found that the minimize, maximize and close button icons on the application window have become 1, 2, 3, and It was changed to a question mark or garbled. How is this going to happen? How can I solve it?
A: This is a common fault in Windows XP. The reason for this failure is that abnormal shutdown causes the system to display on the minimize, maximize and close buttons. The graphic font is missing or corrupted. The solution to this problem is to find a font file named Marlett.ttf on another computer with the same operating system installed and copy it to the folder of your computer system installation partition. Another way is to restart the operating system, press the F8 key to bring up the system menu before the system starts, and then select “Safe Mode” to start the system, then exit normally in “Safe Mode” and restart the system. It can also solve the problem.