What is npkcrypt?
Npkcrypt.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 npkcrypt.sys is a Windows system file or if it belongs to an application that you can trust.
Run a free scan to check for npkcrypt drivers in need of updating
Npkcrypt.sys file information
The process known as nProtect KeyCrypt Driver belongs to software nProtect KeyCrypt Driver or MapleStory or Lineage II by INCA Internet Co. (global.nprotect.com).
Description: Npkcrypt.sys is not essential for Windows and will often cause problems. The npkcrypt.sys file is located in a subfolder of "C:\Program Files" or sometimes in a subfolder of C:\ or in a subfolder of the user's "Documents" folder.
Known file sizes on Windows 10/8/7/XP are 23,217 bytes (42% of all occurrences), 21,442 bytes, 25,074 bytes, 34,978 bytes or 20,386 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 file is not a Windows core file.
npkcrypt.sys appears to be a compressed file.
Therefore the technical security rating is 32% dangerous, however you should also read the user reviews.
Recommended: Identify npkcrypt.sys related errors
Important: Some malware camouflages itself as npkcrypt.sys. Therefore, you should check the npkcrypt.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.
Best practices for resolving npkcrypt issues
A clean and tidy computer is the key requirement for avoiding problems with npkcrypt. 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 npkcrypt.sys 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
mhk.sys slee401.exe pctesphooking32.dll npkcrypt.sys vmwareservice.exe cafeagent.exe avmanager.exe tb_webripieplugin.dll cwbsvstr.exe pnhimp.dll iefilter.dll [all]
Score
User Comments
haydenzhang (further information)
marty
Summary: Average user rating of npkcrypt.sys: based on 2 votes with 2 user comments. One user thinks it's neither essential nor dangerous. One user thinks npkcrypt.sys is dangerous and recommends removing it. One user is not sure about it.