Thanks, I think I've understood what you mean. I see in registry the value for this name is "%USERPROFILE%\Application Data", now if I change it to "D:\My Documents\Application Data", then all things in the original application data folder will automatically move to the new one in "D:\My Documents", including quick launch? And if I install the program free launch bar, will this program be automatically redirected to the new folder? And will this relocation cause bad result? Will uninstallation of program remove info. in the new folder that's due? What you mention here is only for current user, what about all users? I see in "C:\Documents and Settings" there are three folders, they are "administrator", "all users" and "default user". Thanks again, a few more questions in here. :-)