What is STC.dll?

STC.dll is a browser extension for Internet Explorer. This add-on enables several additional functions for Internet Explorer. You can disable it through the Extras menu (key combination Alt + X) under Manage Add-ons. The following paragraph provides more information about Splashtop Connect IE Extension.

Click to Run a Free Scan for STC.dll related errors

STC.dll file information

The process known as Splashtop Connect IE Extension belongs to software Splashtop Connect IE or Splashtop Connect for IE by Splashtop.

Description: STC.dll is not essential for the Windows OS and causes relatively few problems. The STC.dll file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 345,968 bytes (80% of all occurrences) or 427,888 bytes. 
This .dll file is a Browser Helper Object (BHO) that runs automatically every time you start your web browser. BHOs are not stopped by personal firewalls, because they are identified by the firewall as part of the browser itself. BHOs are often used by adware and spyware. IDs used by this BHO include 0E5680D1-BF44-4929-94AF-FD30D784AD1D. The program is not visible. STC.dll is able to monitor web browsers. The file has a digital signature. The service has no detailed description. It is not a Windows system file. The STC.dll file is a Verisign signed file. The program can be uninstalled in the Control Panel. Therefore the technical security rating is 34% dangerous.

Uninstalling this variant: In case you experience problems using STC.dll, you can uninstall Splashtop Connect IE or Splashtop Connect for IE from your computer using the Control Panel applet Uninstall a Program, visit the support page or update to a possibly bug-fixed version.

Recommended: Identify STC.dll related errors

Important: Some malware camouflages itself as STC.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the STC.dll process on your PC to see if it is a threat. If Splashtop Connect IE Extension has changed your browser's search engine and start page, you can recover your browser's default settings as follows:

Reset default browser settings for Internet-Explorer ▾
  1. In Internet Explorer, press the key combination Alt + X to open the Tools menu.
  2. Click Internet options.
  3. Click the Advanced tab.
  4. Click the Reset... button.
  5. Enable the Delete personal settings option.
This will reset your Internet Explorer to its default settings. Your browser will start with the familiar start page and search engine—without popups, ads, cookies, but all browser add-ons are deleted too [1]. Make cleaning up your browser and your computer simpler and safer with Security Task Manager.


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Best practices for resolving STC issues

The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active STC process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the STC.dll on your computer displays annoying ads, slowing it down. This type of unwanted adware program is not considered by some antivirus software to be a virus and is therefore not marked for cleanup.

A clean and tidy computer is the key requirement for avoiding PC trouble. 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.

Other processes

STC.dll [all]