This entire operating system is essentially sandboxed, as it doesn’t have access to anything outside of the virtual machine. The other operating system runs in a window on your desktop.
Virtual Machines: A virtual machine program like VirtualBox or VMware creates virtual hardware devices that it uses to run an operating system. If you want to test out a program and run it without it being able to interfere with the rest of your system, you can run any program in a sandbox. Sure, there’s UAC - but as we mentioned above, that’s very minimal sandboxing. User Account Control just restricts access to system files and system-wide settings.ĭesktop programs aren’t generally sandboxed by default. Note that this is very minimal protection - any Windows desktop program could choose to sit in the background and log all your keystrokes, for example. Windows Programs: User Account Control functions as a bit of a sandbox, essentially restricting Windows desktop applications from modifying system files without first asking you permission. In return, we gain some security - the sandbox also isolates apps from each other, so they can’t tamper with each other. They have to declare permissions if they want to do something like access your location. Apps for iOS, Android, and Windows 8 are restricted from doing many of the things standard desktop applications can do. Mobile Apps: Mobile platforms run their apps in a sandbox. Browsers and Other Potentially Vulnerable Applications: Web browsers run in low-permission, sandboxed mode to ensure that they can’t do much damage if they’re compromised:. Microsoft Office also has a sandbox mode to prevent unsafe macros from harming your system. PDFs and Other Documents: Adobe Reader now runs PDF files in a sandbox, preventing them from escaping the PDF viewer and tampering with the rest of your computer. Browser plug-ins, particularly Java, are a frequent target of attacks that use security vulnerabilities to escape this sandbox and do damage. Playing a flash game on a web page is safer than downloading a game and running it as a standard program because Flash isolates the game from the rest of your system and restricts what it can do. Browser Plug-in Content: Content loaded by browser plug-ins - such as Adobe Flash or Microsoft Silverlight - is run in a sandbox, too. 
Web pages can run JavaScript code, but this code can’t do anything it wants - if JavaScript code tries to access a local file on your computer, the request will fail.
Web Pages: Your browser essentially sandboxes the web pages it loads. Much of the code your devices run every day is already sandboxed for your protection:
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