Sandboxie vs. Pre-Existing Keylogger

[Gnosis]

If a keylogger is already present on one's OS, can Sandboxie, installed after-the-fact, quarantine the browser to where that when you close the sandboxed browser that Sandboxie quarantines and deletes what is logged before the keystrokes are sent to the host malware program??

 

[jamescv7]

Will Sandboxie protect me from malicious key-loggers?

Yes, to some extent. First of all, your system (outside the sandbox) must not have been already compromised by an installed key-logger. Sandboxie can not protect against key-loggers that are already running outside the sandbox.

You may want to consider always browsing sandboxed, so you don't accidentally get any key-loggers into your system.

It is very difficult to reliably detect a key-logger. For a lengthy explanation, see Detecting Key Loggers . So the most important tool Sandboxie offers you for protection against key-loggers, is to delete the sandbox.

When you stop all sandboxed activity (in all sandboxes), then proceed to delete the sandbox you're about to use, you can be fairly certain that all key-loggers are dead.

From FAQ

Detecting Keyloggers

 

[Gnosis]

I guess that a keystroke encryption program such as KeyScrambler would do the trick, unless it was an external keylogger that had already been installed between the keyboard and tower jack.