[2015-05-21] DLL-Files.com Support says;
swhk.dll is used by a program called SmartWeb/smartwebhelper, from a company called SoftBrain Technologies), and is considered to be a "Potentially Unwanted Application/Program".
While not technically a virus, PUA's/PUP's can be annoying. They can cause pop-us, redirect your browser traffic, change your default search, track your browsing, and other behavior. Often installed un-intentionally by users as they often piggy back with other software that you installed.
Un-install any program called smartweb, or recently installed software that you have not intentionally installed to resolve issue.