...which is why we didn't bother to check it for you by default.

This would have been useful to know for the past couple years:

"If you regularly work with a large number of folder windows at the same time, you can quickly and easily improve the stability of your PC. By default, each folder you open occupies the same area of RAM. This means that Microsoft Windows XP has to do a great deal of shuffling as you flick between windows, potentially leading to crashes. In the Control Panel, double-click Folder Options and move to the View tab. Scroll down the list in the lower portion of the dialogue box and tick ‘Launch folder windows in a separate process'. Click OK." 

Taken from Microsoft Windows XP: The Official Magazine - 50 Best Tips Ever.

Or how about this little tid-bit from the same article:

"Normally, when you close a program, any associated DLL it has been using will also be terminated – but this isn't always the case. This can result in a sluggish and unstable system if you leave your computer running for a while. To ensure that DLLs are always unloaded from memory, you need to navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer in the registry and create a new DWORD value called AlwaysUnloadDll. Once you've done this, you should give it a value of 1."