The process CAPI_Worker Module belongs to the software CAPI_Worker Module by Teleca Software Solutions AB (www.teleca.com) or Sony Ericsson Mobile Communications AB.
File epmworker.exe is generally located in a subfolder of "C:\Program Files". See if you can remove it. If you are using any hardware (probably using bluetooth), and it is not functioning probably, you can try to reinstall its software. Or, if you cannot use it at all, uninstall that product's software.