Miracast is actually a built-in feature of Windows 8.1, so there is no separate official software to "download." Think of it like a hidden bridge already built into your laptop, waiting for you to walk across it. Here is the story of how to find that bridge: The Tale of the Wireless Bridge
This leads to the central irony of the search query. Windows 8.1 did, in fact, support Miracast—but only in theory. When Microsoft introduced Windows 8.1 as a free update to the maligned Windows 8 in October 2013, the company boasted about “Play To” and Miracast support as a premium feature for the modern, cable-free living room. However, unlike Windows 10 and 11, where Miracast is robustly integrated into the Action Center (the “Connect” button), Windows 8.1 hid this functionality behind a series of arbitrary gates. A user could search for “Add a wireless display” in the Charms bar, but if the system saw that the Wi-Fi adapter did not support the necessary NDIS 6.40 driver model or that the graphics card lacked the required WDDM 1.3 driver, the option simply vanished. No error message. No link to download a missing file. Just silence. miracast download for windows 8.1 free
Have you tried using Miracast on your Windows 8.1 device? Did it work, or did you have to update your drivers? Let us know in the comments below! Miracast is actually a built-in feature of Windows 8
While there is no "Miracast installer," you can often fix issues by downloading specific drivers or official utilities: When Microsoft introduced Windows 8
To help you get this running, I can look into your specific hardware. Let me know: What is your laptop model Are you getting a specific error message (e.g., "Your PC doesn't support Miracast")? are you trying to cast to (TV, Roku, Firestick)?