Users with many folders on their system may experience an annoying problem in Windows Vista which has already plagued many Windows XP users as well.
Windows remembers by default the folder view settings of 200 local folders and 200 network folders initially.
So, whenever you change the default folder view to something else, for instance large icons or details instead of the default, you are using up one of the save slots that Windows provides you with.
Windows Vista remembers 5000 folders which is usually enough for most users but since this is a hardcoded value, it may pose issues if the limit is exceeded.
Some users have more than 5000 folders on their system and they will experience that folder view is resetting itself whenever the limit is reached. It works like a first in first out cache once the limit has been reached.
This means that you may find yourself constantly adjusting the folder view preference of folders on a PC running Microsoft Windows Vista.
Here is what you need to do to fix it (via Redmond Pie):
Open the Windows Registry by pressing Windows R, typing regedit and hitting enter.Note that you may get an UAC prompt depending on the operating system you are running.
Now navigate to the Registry key HKEY_CURRENT_USERSoftwareClassesLocal SettingsSoftwareMicrosoftWindowsShell and create a new DWORD (32-bit) Value and name it BagMRU Size. Make sure it is named exactly like that. Double-click the entry and give it a value of 10000 which doubles the default number of folder saves. The 10000, as you may have guessed already, is the maximum number of saved folder views on the system.
Work with your system for a while and see if all folder view settings are remembered. If it is not enough increase the number a second time to 15000 or even 20000. The same can be applied to Windows XP, the limit in XP seems to be 8000 though which means that you will never be able to go higher than that.
Update: The feature works in newer versions of the Windows operating system as well.