LsClient is not a true scanning agent and cannot be used to scan machines locally. LsClient just sends a scan request to your Lansweeper server. To scan a machine locally, you need to use LsPush.
Note that you don't need an email client to run LsPush. If you perform a basic LsPush scan by copying the LsPush executable to a client machine and double-clicking on it, the scan results will be attached to email if possible
BUT will also be copied to your temporary folder. Scan results must be placed in Program Files (x86)\Lansweeper\Service\import on your Lansweeper server.
For examples of other ways to run LsPush (e.g. using a script), refer to page 73 and beyond of our online documentation: http://www.lansweeper.com/documentation.pdf
Note that we use the page numbers listed at the bottom of each page.