What is webcheck.dll?
The genuine webcheck.dll file is a software component of Windows Internet Explorer by Microsoft Corporation.
"Webcheck.dll", when found in "C:\Windows\System32", (and in "C:\Windows\SysWOW64" on 64-bit systems), is a Microsoft library of functions other procedures can call; it cannot be executed directly. When Internet Explorer 4.0 introduced Active Desktop with the ability to use a web page as the desktop, or create multiple objects on the desktop with web content, WebCheck loaded at startup to automatically retrieve this Internet data. It also included logic to hang up an inactive dialup connection. Active Desktop was discontinued in Windows 7 and Windows 8 introduced "live tiles" instead. "Webcheck.dll" still exists in Windows 10 for undocumented reasons.
webcheck stands for Web Site Monitor
Webcheck.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 webcheck.dll is a Windows system file or if it belongs to an application that you can trust.
Click to Run a Free Scan for webcheck.dll related errors
Webcheck.dll file information
The process known as Web Site Monitor belongs to software Windows Internet Explorer or Internet Explorer or Microsoft Windows Operating System by Microsoft (www.microsoft.com).
Description: Webcheck.dll is not essential for Windows and will often cause problems. The webcheck.dll file is located in the C:\Windows\System32 folder.
Known file sizes on Windows 10/11/7 are 236,544 bytes (46% of all occurrences), 233,472 bytes and 19 more variants. 
The program has a visible window. The application starts upon Windows startup (see Registry key: ShellServiceObjectDelayLoad).
It is not a Windows system file. The webcheck.dll file is a trustworthy file from Microsoft.
Therefore the technical security rating is 6% dangerous, however you should also read the user reviews.
Recommended: Identify webcheck.dll related errors
If webcheck.dll is located in a subfolder of "C:\Program Files", the security rating is 54% dangerous. The file size is 196,096 bytes.
The file is not a Windows core file. The webcheck.dll file is able to change the behavior of, or monitor Internet Explorer. The program has no visible window.
Uninstalling this variant:
If you are having problems with webcheck.dll, you may also safely remove the program using the
uninstall program of
Web Check (Control Panel ⇒ Uninstall a Program).
Important: Some malware disguises itself as webcheck.dll, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the webcheck.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 webcheck issues
A clean and tidy computer is the key requirement for avoiding problems with webcheck. 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 webcheck.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
prismxl.sys wsmsvc.dll wr_tray_icon.exe webcheck.dll wdsmanpro.exe yaoffer50160.exe rlvknlg.exe mbamsi32.dll avgidsagent.exe ddvrulesprocessor.exe startmenu8.exe [all]
Score
User Comments
gggirlgeek (further information)
SparX
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Michael Kolarits
Sytec
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Ken M.
(further information)
Summary: Average user rating of webcheck.dll: based on 32 votes with 9 user comments. 9 users think webcheck.dll is essential for Windows or an installed application. 6 users think it's probably harmless. 4 users think it's neither essential nor dangerous. 5 users suspect danger. 8 users think webcheck.dll is dangerous and recommend removing it. 6 users don't grade webcheck.dll ("not sure about it").