What is prosync1?

Prosync1.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if prosync1.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for prosync1 drivers in need of updating

Prosync1.sys file information

The process known as StarForce Protection Synchronization Driver belongs to software StarForce Protection Synchronization Driver (version v1) or StarForce Protection System by Protection Technology (

Description: Prosync1.sys is not essential for Windows and will often cause problems. Prosync1.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 6,944 bytes (85% of all occurrences) or 7,040 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. There is no detailed description of this service. The prosync1.sys file is not a Windows core file. Therefore the technical security rating is 40% dangerous, however you should also read the user reviews.

Recommended: Identify prosync1.sys related errors

Important: Some malware camouflages itself as prosync1.sys. Therefore, you should check the prosync1.sys 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.


User Comments

Teil eines Kopierschutzes diverser Spiele
This file causes a blue screen crash when using NDAS network disks
gehört zu kopierschutz, mit erd-commander booten und in regedit bei "HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services" den ordner "prosync1" löschen
  itsfun   (further information)

Summary: Average user rating of prosync1.sys: based on 4 votes with 3 user comments. One user thinks prosync1.sys is essential for Windows or an installed application. One user thinks it's neither essential nor dangerous. One user suspects danger. One user thinks prosync1.sys is dangerous and recommends removing it. One user is not sure about it.

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Best practices for resolving prosync1 issues

A clean and tidy computer is the key requirement for avoiding problems with prosync1. 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 prosync1.sys 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

prosync1.sys [all]