What are the main differences in environment variables between SYSTEM privileges and administrator privileges?

Under SYSTEM privileges, environment variables like APPDATA, Temp, Tmp, USERDOMAIN, USERNAME, and USERPROFILE point to system-level paths. For example, `echo %appdata%` returns `C:\Windows\system32\config\systemprofile\AppData\Roaming`, whereas an administrator sees `C:\Users\a\AppData\Roaming`. Similarly, the API `SHGetSpecialFolderPath` returns different paths depending on the privilege level. These differences can prevent tools like desktop capture from working correctly.