What is PCTCore?

PCTCore.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 PCTCore.sys is a Windows system file or if it belongs to an application that you can trust.

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

PCTCore.sys file information

The process known as PC Tools KDS Core Driver or PCTools KDS belongs to software Kernel Driver Suite or PCTools KDS by PC Tools (

Description: PCTCore.sys is not essential for the Windows OS and causes relatively few problems. PCTCore.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 207,792 bytes (18% of all occurrences), 207,280 bytes and 11 more variants. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. It is a Verisign signed file. PCTCore.sys is digitally signed. The service has no detailed description. The PCTCore.sys file is not a Windows system file. PCTCore.sys is a keyboard driver, can record inputs. PCTCore.sys appears to be a compressed file. Therefore the technical security rating is 41% dangerous, however you should also read the user reviews.

Recommended: Identify PCTCore.sys related errors

Important: Some malware disguises itself as PCTCore.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the PCTCore.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

i think this is cousing my pc to crash as it appers as an error in my event veiwer just b4 a messege saying windows was inproperly shut down
  pog 13  
pctcore.sys is driver for PCTools software
Bei mir unter Win XP mit 239168 Bytes gehört es zu PC Tools Internet Security Anti Spyware und überwacht Tastatur, Festplatte etc. und warnt bei Schnüffelprogrammen. Bei Deinstallation werden alle Dateien aus dem Verzeichnis und aus der Registry gelöscht. Danach ist der Computer merklich schneller.
my keyboard is typing gobbledygook , I have tried everything to resolve the problem but have just spotted a notice in plug and play which advised that a device Root/LEGACY\FSBL-0000 disappeared without being prepared for removal, Then i was informed that the PC tools browser defender service depends on the following nonexistant service:PCTCore. Since then my keybord hasn't worked, tried another key board it wasn't as nad but still unusable

Summary: Average user rating of PCTCore.sys: based on 4 votes with 4 user comments. 2 users think PCTCore.sys is essential for Windows or an installed application. One user thinks it's probably harmless. One user suspects danger. One user is not sure about it.

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Best practices for resolving PCTCore issues

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

PCTCore.sys [all]