2014-09-18 Our Support says:
mgrldr.dll appears to be a part of the Bandoo Data manager.
The Bandoo Data manager is a software said to inform you about the latest updates, if available for the softwares which are already installed on the computer. It can also be a threat in disguise.
It is created by Bandoo Media Inc. It may be related to a number of potentially unwanted applications and browser extensions such as Searchqu Toolbar. At first glance, Bandoo Datamngr seems to be a harmless add-on that provides you with emoticons for your Gmail, Facebook and other instant messaging chats. As such, Bandoo Datamngr is not a computer virus, despite the fact that some websites present it as a browser hijacker or even a Trojan. The problem with this application is that due to its vulnerabilities it could be exploited by a malicious third party to distribute malware and it may display commercial advertisements.
If you are missing the mgrldr.dll, it is likely caused by your antivirus detecting it as a threat, and removing it.
Uninstall Bandoo Data manager, or re-install, making sure your antivirus does not interfer to get rid of any errors regarding this file.
You might have to restore settings in your browser to completely get rid of the Bandoo data manager;
Press Alt+X and click Manage add-ons. Remove anything related to Bandoo Media from Toolbars and Extensions. Click Search Providers on the left. Set a new default search engine and remove Web Search. Mozilla Firefox
Press Ctrl+Shift+A and Add-ons manager tab will open. Remove Bandoo and DataMngr from Extensions. Click search engine icon at the top right corner, next to the search box. Select Manage Search Engines from the drop-down menu. Remove Web Search from the list and click OK. Google Chrome
Press Alt+F and click Settings. Under Search click Manage Search Engines. Set a new default search engine and remove Web Search from the list. Click Done.