General configuration tab.... explained here:
http://warp9td.com/index.php/faq/faq-mach3#WatchdogOrRunsOutOfDatasuggestion, have a work through the warp9 FAQ section as it is way better than the manuals ever were and covers a whole raft of common items.
you've also not mentioned what (your new laptop) operating system you are running, but presuming its W10, then there have been issues with automatic updates stopping the ess communicating with the PC because W10 is doing some antivirus stuff.
Really the best solution for cnc is to have a dedicated cnc PC.... so it has one purpose in life.... ok, my setup is a little different, I have a cheap old PC running XP, 2gb graphics card (didn't have another purpose for it), 4gb ram I think and a hdd (may upgrade to SSD at some point, the 120gb drives without a case seem nice and cheap at the moment). no antivirus, just windows with all the updates, an old copy of autocad (so I can convert dwg's to dxf and do minor mods), sheetcam , and my cnc software (mach3, mach4, uccnc) and it runs happy feeding it memory sticks with software and gcode / sheetcam job files. If I were you, I'd clear out your 8 year old laptop (reformat, maybe SSD, max ram it will take) and load up whatever flavour of windows you prefer (and that your laptop has drivers for)..... note, some laptops have a emergency boot partition which holds the backup copy of windows .... need to read the manual of how you get a complete reinstall from it but it will have all your drivers.... although its sometimes beneficial to go to the manufacturers website and get the latest drives and bios updates and once they are loaded you should never have to do them again..... I would turn off the wifi on a laptop too so that its not potentially polling when trying to run cnc software.