Given the lack of definitive information, you must treat winbidi.exe with caution until you can verify its origin and behavior.
It allows Lexmark printers to send and receive real-time data from Windows operating systems (such as reporting ink levels or paper jams). However, like many genuine executable files, its identity can be spoofed by malware to evade detection. winbidi.exe
If it’s in C:\Program Files\Common Files (and associated with a known app), it might be safe. Given the lack of definitive information, you must
| Legitimate WinBidi.exe | Suspicious / Malicious | |------------------------|------------------------| | Located in C:\Windows\System32 | Located in C:\Users\[Name]\AppData , C:\Temp , or C:\ProgramData | | Signed by Microsoft | No digital signature or invalid signature | | File size 50–150 KB | File size > 1 MB or < 20 KB | | CPU usage near 0% when idle | High CPU usage even without printing | | Appears only during printer tasks | Always running, even without printers | If it’s in C:\Program Files\Common Files (and associated
Win32 / Win64 Portable Executable (GUI or Console application) Trojan.Generic, Backdoor, or Crypto-Miner Standard Native Directory None. (Legitimate core files live in C:\Windows\System32 ) Typical Malicious Directory
Open Task Manager ( Ctrl + Shift + Esc ), right-click Winbidi.exe, and select End Task .