After upgrading from Windows 8 Pro 64bit to Windows 8.1 Pro 64bit on my Sony Vaio Duoe 13, I could not find WPA security type while configuring Wireless network manually. (only WPA2 and 802.1X are available).
I have done a lot of troubleshootings like
1-Reinstall Wirless original driver
2-Updating the wireless driver to the latest
3-Uninstall and reinstall windows 8 then upgrading again to windows 8.1
But the same.
Is there any way to add WPA to the security type?