Windows XP Doesn't Remember Folder Settings Anymore.
Windows XP is by default set to remember 400 different folder settings. If you have more than 400 folders on your system, then they will start to loose their settings at random. Since Windows XP is a modern system intended for users on very big systems most users will sooner or later hit this limit. But his limit can be increased and this annoying behavior fixed.
Start the Registry Editor (go to Start, Run and type Regedt32). Find the keyHKEY_CURRENT_USER\Software\Microsoft\Windows\Shell. Add the REG_DWORD valueBagMRU Sizeand set the value to3e8.
Find the keyHKEY_CURRENT_USER\Software\Microsoft\Windows\ShellNoRoam. Add the REG_DWORD string valueBagMRU Sizeand set the value to3e8.
Or if you prefer, you can download and use this.reg file.
Windows XP now remembers the settings of a 1000 folders. Use the value7d0instead and Windows XP will remember 2000 folders