What is pdfPro5Hook.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 pdfPro5Hook.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.

Click to Run a Free Scan for pdfPro5Hook.exe related errors

PdfPro5Hook.exe file information

Windows Task Manager with pdfPro5Hook
PdfPro5Hook.exe process in Windows Task Manager

The process known as PdfCreateHook Application belongs to software Nuance PDF Viewer Plus or Nuance PDF Professional (version 5) by Nuance Communications (

Description: PdfPro5Hook.exe is not essential for the Windows OS and causes relatively few problems. PdfPro5Hook.exe is located in a subfolder of "C:\Program Files" or sometimes in a subfolder of the user's "Documents" folder. Known file sizes on Windows 10/8/7/XP are 636,192 bytes (65% of all occurrences), 1,626,112 bytes, 795,936 bytes or 1,365,280 bytes. 
The program is not visible. The software starts when Windows starts (see Registry key: MACHINE\Run). The file is not a Windows system file. The file is a Verisign signed file. The pdfPro5Hook.exe file is digitally signed. The application can be removed using the Control Panel's Add\Remove programs applet. PdfPro5Hook.exe is able to record keyboard and mouse inputs, hide itself and manipulate other programs. Therefore the technical security rating is 30% dangerous.

Uninstalling this variant: If you are having problems with pdfPro5Hook.exe, you can also do the following:

Recommended: Identify pdfPro5Hook.exe related errors

Important: Some malware camouflages itself as pdfPro5Hook.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the pdfPro5Hook.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 pdfPro5Hook issues

A clean and tidy computer is the key requirement for avoiding problems with pdfPro5Hook. 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.

To help you analyze the pdfPro5Hook.exe process on your computer, the following programs have proven to be helpful: ASecurity 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. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

pdfPro5Hook.exe [all]