http://www.malwaredictionary.com/2011/03/wlidsvc-exe/ WLIDSVC.EXE works with the WLIDSVCM.EXE process to provide the Windows Live Sign-In Assistant service to the end user. WLIDSVC.exe does the majority of the work of providing the service; however, many Windows users have questions about what the process accomplishes when viewing the active process listing on a Windows computer.