Yes, even though I uninstalled 3633 and then installed 3666, the old tasks CANNOT be edited. Dreadful! I run my tasks form WinXP Task Scheduler and the tasks run okay and can be manually verified. But I can't edit the tasks in Acronis anymore -- I get the "E00640065: Cannot resolve the source path. Cannot resolve the pathto the source. You should edit this task." message and the suggestion that the task should be edited. Oy veh! Someone said "A" for ingenuity but not so hot on quality. With Backup/Imaging/Clonging software, data integrity, and quality are of utmost importance. Justified confidence in the software is absolutely critical. O only wish the other products on the market weren't even worse. I'm guessing the "source path" issue is a matter of a registry entry not being correctly created or updated when 3666 is installed. I even created a new task to replace the one with the "source path problem" and the same error message comes up. Oh Acronis! SAy it isn't so!