Tackled challenges included reducing I/O cost, which is super important for older hardware, and involves being smarter about which bits of data are pulled from a potentially infected file, rather than scan the entire thing.

That's while at the same time making sure that the implementation is as secure as possible.

A sandbox would still need some access to the main system, of course, and that means that performance could be dragged down if there's too much back-and-forth between the host OS and Defender's sandbox. To a regular Joe or Jill, implementing a sandbox might not seem like a big deal, but there are extremely important precautions to take. Breaking out of a sandbox is 'so much more difficult on the latest versions of Windows 10', according to this post.

Microsoft acknowledges that one of the reasons sandboxes were finally implemented was because privilege escalation would be possible with the current design, although the official blog post notes that there's been no sign whatsoever of the design being exploited (and it's extremely difficult to pull off). If a threat occurs, Defender will now keep it in the sandbox, thus preventing the rest of the system from becoming infected, and in effect spreading further corruption. Microsoft notes that redesigning Defender to utilize sandboxes was not an easy task, but it's an important way to spend developer effort, as it could really save someone's bacon (or veggie bacon) if they're struck by a malicious piece of digital software. Windows Security center in Windows 10, including Defender functionality After years of figuring out the best direction to take Defender, Microsoft decided that implementing sandboxes was the only reasonable route, a technique we've seen used in many pieces of software, even our web browsers. In a brand-new Windows Insider build, a massive overhaul of Defender can be found. Many have come to trust it so much, that they don't even run an additional anti-virus solution, and Microsoft takes that responsibility seriously by constantly iterating on the software's capabilities. It's not common to find free software that appears to be as feature-rich and capable as the commercial competition, but where Windows Defender is concerned, it's arguably one of the best free antivirus and anti- malware solutions out there.

Windows defender sandbox