Update README.md

Author: bakapear

README.md

@@ -1,2 +1,16 @@
 # stadia2xbox
 Emulates a Xbox 360 Controller from a Stadia Controller
+
+Originally a fork of https://github.com/71/stadiacontroller/ but heavily rewritten.
+
+### Installation
+1. Install [ViGEm](https://github.com/ViGEm/ViGEmBus/releases)
+2. Download the latest release from the [releases page](https://github.com/bakapear/stadia2xbox/releases)
+3. Run stadia2xbox.exe
+
+### Troubleshooting
+The program tries to open your stadia controller in exclusive mode which requires it to not be accessed by any other program. To regain access try the following:
+- Close any application that might use the controller (Steam, Browser, etc...)
+- Replug the controller
+- Go to the device manager and disable/enable "HID-compliant game controller"
+- Restart computer