Fast means you'll see more previews released but they may contain more bugs.
Slow means the previews will be doled out to you at a more leisurely rate but they may be a bit more stable.
, Microsoft Most Valuable Professional Curt Frye helps dispel the common fear of the Pivot Table feature, by demonstrating how to use this powerful tool to discover valuable business intelligence.
Windows 10, Microsoft's first big chance to move beyond the missteps of Windows 8, is expected to Currently, updates for Windows, Office and other Microsoft products are downloaded directly from Microsoft servers.
But if Microsoft's site is too slow or inaccessible for some reason, you'll now have an alternative avenue for making sure your PC can get the latest security patches, bug fixes and other updates.
Downloading updates from other PCs in a peer-to-peer fashion does open up issues of security and reliability.
But Microsoft would certainly be aware of the potential pitfalls and is likely taking steps to ensure that any updates received from other PCs over the Internet would be safe and secure.