I’ve seen issues with the Asus T100 where the Wi-Fi will frequently not reconnect after coming out of standby, hibernate, or a power off. Toggling airplane mode or rebooting the device will fix it, but not always the first time.
I found a fix for this, after reviewing the fix for frequently disconnecting Bluetooth devices, and the issues appear related.
Again, go into device manager and right-click the wireless network adapter, and click Properties. Go to the Advanced tab and change Minimum Power Consumption to Disabled.
After doing this, no more Wi-Fi issues!