Dell stated that they did not test this machine for Windows 10 and you will not be able to get the right drivers form Dell website. Actually the drivers is available on dell website but they did not test it for 5520, and the compatible driver is available and listed for other model. Furthermore, there are lots of users tested Windows 10 on this notebook and here is the driver that worked:
Intel HM77 Chipset Driver (direct from dell)
(The original Windows 8.1 drivers form dell website).
Conexant CX20672-21Z Driver : Download(32/64-bit)
(filename: Audio_Driver_Y1116_WN_18.104.22.168_A00.EXE )
1. This driver package contain the drivers for Windows 7,8 and 8.1. Sometimes it installs the wrong drivers.
2. So first download and install uniextract software.
3. Extract the driver we’ve downloaded earlier, and we will have all the folders : win7 x86, win7 x64m win8 x86 and win8.1 x64.
For windows 10 64-bit, open win8.1 x64 folder and run setup64.exe
For Windows 10 32-bit open win8.1 x86 folder and run setup.exe
Graphic – Intel:
Intel HD Graphic 4000 drivers
You can also get the latest drivers form Intel download center website.
Version :10.18.10.4276, A02 Download
Graphic – AMD:
AMD Radeon HD 7670M/8730M
Other drivers should be installed using Windows automatic updates. If you have problems leave your comments below.