Most antivirus programs identify mdi264.dll as malware—e.g. TrendMicro identifies it as TROJ_SPNV.01D714 or TROJ_GEN.R00UC0DIO15, and Symantec identifies it as Trojan.Gen.2 or Trojan.Gen.
The free file information forum can help you find out how to remove it. If you have additional information about this file, please leave a comment or a suggestion for other users.
The mdi264.dll process does not provide any identification of the producer.
Description: Mdi264.dll is not essential for Windows and will often cause problems. Mdi264.dll is located in a subfolder of Windows folder for temporary files—normally C:\Users\USERNAME\AppData\Local\Temp\.
Known file sizes on Windows 10/8/7/XP are 3,458,560 bytes (50% of all occurrences), 2,923,008 bytes or 1,456,128 bytes.
The program has a visible window. There is no description of the program. The program starts when Windows starts (see Registry key: Run). The file is not a Windows core file. Mdi264.dll is able to record keyboard and mouse inputs. Therefore the technical security rating is 36% dangerous.
Recommended: Identify mdi264.dll related errors
If mdi264.dll is located in the Windows folder for temporary files, the security rating is 42% dangerous. The file size is 1,456,128 bytes (66% of all occurrences) or 1,494,528 bytes. There is no file information. It is not a Windows core file. The process starts when Windows starts (see Registry key: Run). Mdi264.dll is able to record keyboard and mouse inputs.
Important: You should check the mdi264.dll process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.
The following programs have also been shown useful for a deeper analysis: ASecurity Task Manager examines the active mdi264 process on your computer and clearly tells you what it is doing. Malwarebytes' well-known Banti-malware tool tells you if the mdi264.dll on your computer displays annoying ads, slowing it down. This type of unwanted adware program is not considered by some antivirus software to be a virus and is therefore not marked for cleanup.
A clean and tidy computer is the key requirement for avoiding PC trouble. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.
Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.