Success Story with getting switchable graphics to work on Windows 10 with an Inspiron 15r se / Inspiron 7520

For background, some Dell laptops have a feature where they use a low-powered intel graphics card when undemanding applications are running, but they switch to a high-power, high-wattage graphics card (AMD Radeon series) when demanding games are running. With the AMD/Intel version of this, it is a very fragile configuration and you can't download any old version of the drivers and expect them to work. Dell engineers have to specificaly craft a version of the intell driver installers that is compatible with this configuration.

Automatic driver/windows updates and OS changes can trounce on this delicate configuration and you're at the mercy of the Dell support people about when you'll get an updated driver. If you just use the vanilla Intel video drivers, they won't respect the AMD wish to take control of graphics and the AMD video card will sit unused in your laptop.

There are three parts to getting Windows to use your preferred driver for the hardware, one is removing any installed software that provides drivers. This is done by uninstalling all software that puts drivers on the hard drive. The second step is to delete any drivers that windows is pegged against because Windows will not allow drivers it is using to be fully uninstalled. This is done by putting Windows into "safe mode" where it does not use most drivers and then uninstalling and deleting the driver files themselves. the final step is installing your preferred drivers, both the AMD and Intel video drivers in this case.

Here's how I got AMD/Intel switchable graphics to work in Windows 10:

1. I went to the dell drivers site with Internet Explorer (not Microsoft Edge/Google Chrome/etc.) and used the system detect feature to recognize my laptop. I then downloaded the Intel and AMD video drivers for 64-bit Windows 10
2. I uninstalled all AMD and Intel video drivers via the add/remove programs app in the Windows control panel.
   1. You can search for "Remove programs" in the search box on the windows bar to get to the applet in Windows 10.
   2. There are a lot of Intel drivers for things like network adapters, be sure to only uninstall drivers for video cards.

3. I booted into Windows 10 safe mode. Search for instructions on the internet for how to get into safe mode.
4. I opened the control panel and went to the device manager to delete the video drivers left on the system.
   1. I think currently-used driver files are not fully uninstalled when you uninstall driver software in the normal way, you have to do more.
   2. Open the device manager (one way is windows key + 'x')
   3. Open display adapters, there should be one for intel and one for amd. 
   4. Right click each display adapter and choose uninstall. Then click on the delete driver option checkbox and delete the drivers
   5. reboot
5. After rebooting, verify that the display adapters in the device manager are very generic, they probably won't say intel or amd.
6. Install the intel device driver software you downloaded from dell
7. reboot
8. Install the amd device driver software you downloaded from dell
9. reboot
10. You should now see the "Configure switchable graphics" option if you right-click the desktop.
11. Try running a game that demands a little of the graphics card
12. Open the "Configure switchable graphics" app and verify that it found the game you just ran and that it set it for "high performance"
13. done

You should probably be on A/C power during all of this. I think I've heard that switchable graphics can change if on battery power, not sure.

Skyrim worked fine after doing this, and l4d2's intros ran very smoothly (they're incredibly choppy when they run on the intel graphics), but the app itself crashed without warning to the desktop just as it finished loading a single-player campaign for me. I suspect that this is probably more a windows 10 thing than an graphics thing and I hope reinstalling the game will fix it.