Some anti-malware programs classify mystartDx.dll as a harmful extension to Internet Explorer: for example WS.Reputation.1 (detected by Symantec), and Generic PUA BH (detected by Sophos). Add-ons like this can display ads, slow down your computer and cause various other errors. If you can't remember installing the associated MyStart Toolbar Link Library software, it's no surprise. In most cases, this kind of adware is installed on the side when you install a freeware product like a Youtube Downloader or a PDF Converter. In the following selection, you can read more about MyStart Toolbar Link Library and how to get rid of it.
Description: MystartDx.dll is not essential for the Windows OS and causes relatively few problems. MystartDx.dll is located in a subfolder of "C:\Program Files (x86)" (e.g. C:\Program Files (x86)\mystarttb\ or C:\Program Files (x86)\ManyCam\).
Known file sizes on Windows 10/8/7/XP are 114,952 bytes (63% of all occurrences), 86,696 bytes or 114,752 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 ccb24e92-62c4-4c53-95d2-65f9eed476bc. The program is not visible. The file is able to change the behavior of, or monitor Internet Explorer. The file is digitally signed. The mystartDx.dll file is not a Windows core file. Therefore the technical security rating is 63% dangerous.
Recommended: Identify mystartDx.dll related errors
Important: Some malware also uses the file name mystartDx.dll, for example WS.Reputation.1 (detected by Symantec), and Generic PUA BH (detected by Sophos). Therefore, you should check the mystartDx.dll process on your PC to see if it is a threat. If MyStart Toolbar Link Library 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 ▾
The following programs have also been shown useful for a deeper analysis: ASecurity Task Manager examines the active mystartDx process on your computer and clearly tells you what it is doing. Malwarebytes' well-known Banti-malware tool tells you if the mystartDx.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 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.