Many Windows installers create randomly named folders or files in the root directory (like your D: drive) during an update or installation.
Check the file extension (e.g., .exe, .txt, .zip). In Windows, you may need to unhide file extensions in your folder settings to see the full name.
Because the name itself doesn't tell us what the file does, you should treat it with caution.
Only download files if they come from a verified, reputable website. If a site looks like an " EvilPortal " (a fake website designed to mimic a real one), do not proceed.
If you are seeing many strange files and suspect your system files might be corrupted, experts on Reddit suggest running the sfc /scannow command in your terminal with admin privileges to repair the Windows file system.