Features of Windows 8.1
1. Direct Desktop Boot Support2. Resize Apps Windows
3. Improved Device Encryption
4. Resistance to Everyday Malware Attacks
5. Remote Business Data Removal in case of lost or Stolen
7. Integrated VPN
8. Broadband Tethering
9. NFC Tap To Pair Support
10. Web Application Proxy
11. Enhanced Environment for Virtual Desktops
Download here:windows 8.1 32-bit
Download here:windows 8.1 64-bit