Why does the application t appear to be preventing me from restarting when I restart in Windows 11?

This is the Q&A site for those who are passionate about programming, so from that perspective.

The program "G" is presenting you from shutting down and the Japanese commentary Microsoft explains a mysterious "G" app that prevents Windows 10 from shutting down.

There are two types of Windows that handle strings.

• ANSI (Shift-JIS in Japanese)
  Each character and byte are basic, and non-ASCII characters such as Japanese characters are 2 bytes.
  For example, ABC is 0x610x620x630x00 and the termination NUL is added to make it 4 bytes.
• Unicode (strictly UTF-16)
  One character and two bytes are basic.Even ASCII characters are two bytes, in which case the higher bit is zero.
  For example, ABC would be 0x610x000x620x630x630x630x00x00, which would be 8 bytes.

Now, if the API misuses the string type, that is, interpreting the Unicode ABC as ANSI format terminates with the second byte of 0x00 and becomes the string A.

The article points out that GDI+Hook Window in Unicode is G when interpreted by ANSI, but the same goes for questions, and it's a program that starts with t.
Also, it is meaningless to look for t.exe because what you see here is the title of the window, not the executable name.

Instead of searching for files, look for processes and services in Task Manager