Most antivirus programs identify d.exe as malware—for instance Microsoft identifies it as TrojanDownloader:Win32/Renos.DZ or TrojanDownloader:Win32/Agent.JQ, and Symantec identifies it as Trojan Horse.
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.
There are no author's data about the d.exe process.
Description: D.exe is not essential for Windows and will often cause problems. The file d.exe is located in a subfolder of the user's profile folder.
Known file sizes on Windows 10/8/7/XP are 69,120 bytes (16% of all occurrences), 142,848 bytes and 4 more variants.
There is no information about the author of the file. D.exe is not a Windows core file. The program has no visible window. The process starts when Windows starts (see Registry key: Run). Therefore the technical security rating is 64% dangerous; however you should also read the user reviews.
Recommended: Identify d.exe related errors
If d.exe is located in the Windows folder for temporary files, the security rating is 58% dangerous. The file size is 142,336 bytes (33% of all occurrences), 147,968 bytes or 174,592 bytes. There is no description of the program. The program is not visible. It is not a Windows system file.
If d.exe is located in C:\, the security rating is 70% dangerous. The file size is 36,864 bytes (50% of all occurrences) or 13,824 bytes. The software has no file description. D.exe is not a Windows system file. The program has no visible window.
External information from Paul Collins:
Important: You should check the d.exe 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: Security Task Manager examines the active d process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the d.exe 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 cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic 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 resmon 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 DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.