sdclt.exe" is the process for the Vista backup tool (under Accessories > System Tools). It is used to both back up and restore files that you specify. http://www.neuber.com/taskmanager/process/sdclt.exe.html
Note: The sdclt.exe file is located in the folder C:WindowsSystem32. In other cases, sdclt.exe is a virus, spyware, trojan or worm! Check this with Security Task Manager.