What is prio.dll?
The genuine prio.dll file is a software component of Prio - Process Priority Saver by O&K Software.
Prio.dll is a DLL (dynamic link library) file that is part of the Prio - Process Priority Saver, an extension for the Windows Task Manager. DLL files store data, code and resources needed by one or more programs in order to function correctly. This is not a critical Windows file and can be removed if known to create problems.
Since Windows is a multitasking operating system, many processes can run simultaneously. 'Process priority' defines what processes get more processor time. A process that is set to run at high priority will take up all processing time and a process at low priority will only receive idle processor time. Prio assigns and remembers priority settings for running tasks. It extends on the core functionality of the Windows Task Manager.
O&K Software was founded in 1999 and focuses on the development, distribution and support of utility software designed for the Windows platform.
Prio stands for Prio Process Control
Prio.dll is a Windows DLL file. DLL is the abbreviation for Dynamic Link Library. DLL files are needed by programs or web browser extensions, because they contain program code, data, and resources.
The following information can help you determine if prio.dll is a Windows system file or if it belongs to an application that you can trust.
Click to Run a Free Scan for prio.dll related errors
Prio.dll file information
The process known as Prio Process Control belongs to software Prio - Process Priority Control or eBoostr (version 3) by O&K Software (www.prnwatch.com).
Description: Prio.dll is not essential for the Windows OS and causes relatively few problems. The prio.dll file is located in a subfolder of "C:\Program Files (x86)" (e.g. C:\Program Files (x86)\Prio\).
Known file sizes on Windows 10/11/7 are 10,000 bytes (66% of all occurrences), 10,512 bytes and 5 more variants. 
A .dll file (Dynamic Link Library) is a special type of Windows program containing functions that other programs can call. This .dll file can be injected to all running processes and can change or manipulate their behavior.
There is no description of the program. The program is not visible. The prio.dll file is digitally signed. The service has no detailed description. It can change the behavior of other programs or manipulate other programs. It is not a Windows system file. The program is loaded during the Windows boot process (see Registry key: AppInit_DLLs).
Therefore the technical security rating is 78% dangerous, however you should also read the user reviews.
Uninstalling this variant:
In case you experience problems using prio.dll, you could do the following:
Recommended: Identify prio.dll related errors
If prio.dll is located in the C:\Windows\System32 folder, the security rating is 77% dangerous. The file size is 10,264 bytes.
There is no information about the author of the file. The program has no visible window. There is no detailed description of this service. It can change the behavior of other programs or manipulate other programs. The prio.dll file is not a Windows core file. It is certified by a trustworthy company. The program starts when Windows starts (see Registry key: AppInit_DLLs).
prio.dll appears to be a compressed file.
Uninstalling this variant:
In case you experience problems using prio.dll, you could do the following:
Important: Some malware camouflages itself as prio.dll. Therefore, you should check the prio.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.
Best practices for resolving prio issues
A clean and tidy computer is the key requirement for avoiding problems with prio. 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 executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.
To get your computer running as fast as it did on day one, you can 8reset your PC. Your personal files will remain intact, but any programs you installed will need to be reinstalled.
To help you analyze the prio.dll 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. A good Bantivirus software detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.
Other processes
startmansvc.exe atkosd.exe mfefire.exe prio.dll contentmanagementserver.exe networx.exe isafesvc2.exe egisupdate.exe gfexperienceservice.exe cppwindowsservice.exe idleproc.dll [all]
Score
User Comments
Daz
Aleksandar
Nicholas
Spike
roy jones
PG
Deji
Joe
Joe
tomash74 (further information)
Patrick Keating
Michael
Summary: Average user rating of prio.dll: based on 15 votes with 13 user comments. 8 users think prio.dll is essential for Windows or an installed application. One user thinks it's probably harmless. 3 users think it's neither essential nor dangerous. One user suspects danger. 2 users think prio.dll is dangerous and recommend removing it. 2 users don't grade prio.dll ("not sure about it").