Vostro 3560: problem re-installing video drivers

Hello

I have a problem with installing video drivers package (Video_Driver_3WKM7_WN_8.933.3.4000_A04 downloaded from dell.com) on my Vostro 3560 laptop.

Initially by mistake I've updated Intel(R) HD Graphics 4000 and AMD Radeon HD 7670M drivers to version 8.951.9.1000 through Windows Update. After that Catalyst Control Center stopped showing Switchable Graphics configuration. And as I understand only Intel card is currently working.

To re-install I've removed both drivers through Device Manager and uninstalled Catalyst Control Center.

But now when I try to install video drivers package all applications are installed but AMD drivers installation fails.

Could anyone help me resolve this problem?

Thank you in advance

PS: Installation log files are attached