Task Scheduler User Name

Recently, the computer name was changed on one of my PCs. Now I am having trouble getting scheduled tasks to run. When I looked at the properties of one of these failed tasks, I noticed that the "Run As" user name was "\". I tried changing it in the task properties window to "\" (the computer name changed, but the user name remained the same), but it would not keep the change. Where is the Task Scheduler getting the old computer name. If it is somewhere in the Registry, can some one tell me what I need to modify to get it to work?