QuickSilver is compatible with windows 2000/XP/VISTA/WIN7.
When upgrading an existing installation of QSL, please install directly into the existing QSL directory. Your data is safe.
You can install QS to the \Program Files\ (or \Program Files x86\) directory on you computer. In this case, all data and configuration files will be kept one of the following directories, depending on windows version:
On 2000/XP:
\Documents and Settings\{your account}\Application Data\QuickSilver\QSL
On VISTA/WIN7:
\Users\{your account}\AppData\Roaming\QuickSilver\QSL
Finally, Flash Drives!
QS can also be installed to any other directory on hard drives, etc. In this case, QS keeps all data and configuration files in it's home directory. That includes mixmaster, gpg, eraser--everything. Nothing gets out. Furthermore, QS makes no registry or start menu entries. This is ideal for use with flash drives when you want to take QS with you to possibly use on some public computer, or simply hide your QS installation from those with access to your computer.