Okay, so this has been happening to me from the last two driver updates, 16.4.2 and the latest 16.5.1.
On both occasions, the files are extracted to the folders, and then the 'Loading Settings' splash shows up, and then nothing. No window or anything.
Opening up the task manager shows that the Install Manager is running under the processes tab, but that's it.
I disabled my firewall and antivirus, but still the same situation.
I tried to attach a process dump file of the Install Manager, but the file is too large.
GPU: Sapphire R9 380 4GB Nitro
Driver: Crimson Edition 16.3.2
CPU: AMD Phenom II X6 1100T
Motherboard: Gigabyte GA-990FXA-UD3 R5
RAM: G.Skill RipjawsX 4 GB x 2 (F3-12899CL9S-4GBXL)
PSU: Corsair GS 600
OS: Windows 7 64-bit Ultimate Edition