Update installation_win7.md

Author: dorodnic

doc/installation_win7.md

@@ -6,13 +6,14 @@
 
 ## Getting Started
 
-1. Download [Intel RealSense SDK Installer for Windows 7]()
-2. Connect the camera (the device must connected to install the driver)
+1. Download [Intel RealSense SDK Installer for Windows 7](https://github.com/IntelRealSense/librealsense/releases/download/v2.16.1/Intel.RealSense.SDK.Win7.exe)
+2. Connect the camera (the device must be connected to install the driver)
 3. Check the device manager:<br />![dev_man](img/win7/device_manager.png)<br />
 > Out of the box Windows 7 will not recognize the D4xx cameras using the inbox driver. 
 4. Run the installer and make sure to check **Win7 Drivers**:<br/>
 ![install](img/win7/installer.png)
 5. The installer will prompt to install the driver. This is a one-time step:<br/>
+![after](img/win7/driver_setup.png)
 ![after](img/win7/device_manager_after.png)
 
 ## Supported Devices:
@@ -28,4 +29,4 @@
 ## Building from Source
 The binaries supporting Win7 differ from ones supporting Win10. When building on Win7, CMake will automatically generate binaries for Win7. 
 You can also build for Win7 from Win10 by adding `-DFORCE_WINUSB_UVC=true` to CMake flags.
-Signed drivers are still required when building from source (can be extracted from the Win7 installer and freely redistributed)
+Signed drivers are still required when building from source (can be extracted from the Win7 installer and freely redistributed)