Most antivirus programs identify mwsbar.dll as malware.
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The process known as My Web Search Bar or My Web Search belongs to software My Web Search Bar for Internet Explorer, FireFox, email clients, and messenger clients or My Web Search Bar for Internet Explorer, FireFox, Netscape, email clients, and messenger clients by MyWebSearch.com (www.mywebsearch.com) or Mindspark Interactive Network (www.mindspark.com).
Description: Mwsbar.dll is not essential for Windows and will often cause problems. Mwsbar.dll is located in a subfolder of "C:\Program Files (x86)"—primarily C:\Program Files (x86)\MyWebSearch\bar\2.bin\.
Known file sizes on Windows 10/8/7/XP are 775,696 bytes (22% of all occurrences), 833,032 bytes and 11 more variants.
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 07B18EA1-A523-4961-B6BB-170DE4475CCA. Mwsbar.dll is not a Windows core file. The program has no visible window. Mwsbar.dll is able to change the behavior of, or monitor Internet Explorer. The file is certified by a trustworthy company. It is a Verisign signed file. Mwsbar.dll is able to record keyboard and mouse inputs. Therefore the technical security rating is 40% dangerous, but you should also take into account the user reviews.
Recommended: Identify mwsbar.dll related errors
External information from Tony Klein:
Important: You should check the mwsbar.dll process on your PC to see if it is a threat. If My Web Search Bar 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 mwsbar process on your computer and clearly tells you what it is doing. Malwarebytes' well-known Banti-malware tool tells you if the mwsbar.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.