What is pdfupd.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the pdfupd.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

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Pdfupd.exe file information

Windows Task Manager with pdfupd
Pdfupd.exe process in Windows Task Manager

The process known as PDF Updater or Remote File Uploader appears to belong to software xzxzzzxzxxzx or wdwweDEWDEADSAAFAF or PDF Complete Special Edition by nullsoft ( or PDF Complete (

Description: Pdfupd.exe is not essential for the Windows OS and causes relatively few problems. The pdfupd.exe file is located in a subfolder of the user's profile folder. Known file sizes on Windows 10/8/7/XP are 34,826 bytes (50% of all occurrences) or 20,490 bytes. 
The program has no visible window. The software starts upon Windows startup (see Registry key: Run, MACHINE\Run). The software uses ports to connect to or from a LAN or the Internet. It is not a Windows core file. Therefore the technical security rating is 83% dangerous.

Recommended: Identify pdfupd.exe related errors

If pdfupd.exe is located in a subfolder of "C:\Program Files", the security rating is 36% dangerous. The file size is 1,152,016 bytes. The program has no visible window. It is certified by a trustworthy company. Pdfupd.exe is not a Windows core file. Pdfupd.exe is able to record keyboard and mouse inputs and monitor applications.

Uninstalling this variant: If you run into problems with pdfupd.exe, you can do the following:
  1) safely remove the program using the uninstall program of PDF Complete Special Edition (Control Panel ⇒ Uninstall a Program)
  2) look for help on the website
  3) make sure that you have installed the latest version.

Important: Some malware also uses the file name pdfupd.exe, for example Trojan-Spy.Win32.Wemon.lx (detected by Kaspersky), and Mal_MLWR-11 (detected by TrendMicro). Therefore, you should check the pdfupd.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.


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Best practices for resolving pdfupd issues

A clean and tidy computer is the key requirement for avoiding problems with pdfupd. 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.

To help you analyze the pdfupd.exe process on your computer, the following programs have proven to be helpful: Security Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

pdfupd.exe [all]