<p>I know Windows Vista (and XP) cache recently loaded DLL's in memory...</p>

<p>How can this be disabled via the command prompt?</p>

The only thing you can do is disable SuperFetch, which can be done from the command prompt with this command (there has to be a space between the = sign and disabled).
```
```
sc config Superfetch start= disabled
```
```
There is a myth out there that you can disable DLL caching, but that only worked for systems prior to Windows 2000. [
source
]