Right-click the new file, go to , and mark it as Read-only and Hidden .
: This prevents NoxPlayer from overwriting the file or making it visible in your folder again. Technical Context of .7z Files
At the bottom of the General tab, check the box for . d4ac4633ebd6440fa397b84f1bc94a3c.7z
The conclusion is that the file is . This confirms the advice given by a Korean IT expert on Naver who simply suggested trying to open it with 7-Zip.
The file generation is frequently triggered when NoxPlayer is closed but kept running silently in the background. Open . Right-click the new file, go to , and
Open and navigate to its System Settings (gear icon). Look for the startup or exit behavior preferences.
Change the setting from "Minimize to system tray" to . Save your changes. Method 3: Hide the File permanently The conclusion is that the file is
Nox generates this file specifically when the player is closed or minimized to the Windows system tray. It caches configuration and session data to help the emulator launch smoothly the next time you use it. Why is it in Your User Folder?
Ideally, temporary application data belongs in the hidden AppData\Local or AppData\Roaming directories. Due to a path-routing quirk in certain versions of the Nox App Player, the program defaults to the root user profile folder ( %USERPROFILE% ) when creating this backup file.
A Japanese file‑sharing site, 雷神７うｐろだ (Raijin 7 Uploader), lists the same file name with a size of 297 bytes. The file was uploaded on November 25, 2022, and has been downloaded approximately 77 times (combined counts of 67+9+1 across three identical entries). The site is a general‑purpose upload service, so the presence of the file there does not automatically indicate malicious intent.