tgcmd.exe is a process associated with an online support software from SupportSoft. It is often used for on-line support by large manufacturers like Sony and Toshiba.
Non-system processes like tgcmd.exe originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that your registry has suffered fragmentation and accumulated invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues