Your client crashes and you receive a message from the Antihack Software saying "Client closed, muguard case 017.
Cheat detected with memory scanning method."Client closed, muguard case 017. Cheat detected with memory scanning method."
Some opened programs inject .dlls into main.exe and they are blocked by MuGuard.
Go to START > Control Panel and uninstall useless softwares such as SweetIM, Download Accelerator Plus, Speedbit Video Accelerator, TuneUP Utilities or any other simillar softwares that are totally useless for your computer.
Hit CTRL+ALT+DEL > Start Task Manager > Processes List > Check Show processes from all users. Order them by Name and start closing processes one by one except system32 ones until you find the fauly process and remember it's name to uninstall it. Everytime you close a process, try to run MU Client.
Close all Tray Icons especially Bluetooth Tray Icon in case you got a laptop. Tray Icons can be found where the clock is displayed, right-down side of your screen, right click them / Mouse 2 and exit.