More often than not, most of the data stored on the average home PC will be
fairly harmless, however, theres almost certainly be some
personal and/or private information you may want to keep secure.
Unfortunately, though, clearing your computer of private data
every time you finish using your it is not something that everybody remembers to do. Another option would
be to run
an application within a self-contained environment, then you could
simply log off without having to manually clear any data.
Sandboxie
3.442 enables users to run applications, including games, in a ‘sandboxed’
environment. This is very useful for anyone using a shared computer. All data
remains within this secure environment, preventing the storage of information on your drive,
which may also help to protect your system from malicious infection.
Sandboxie
3.442 link.