Multiple Games Don't Launch On Windows 7 Ultimate X64

The issue is, that multiple games, such as Total War Shogun, Darksiders 2, Assasins Creed Revelations, Sleeping dogs, simply refuse to launch. I click on their respective icons, and absolutely nothing happens. For some of them the mouse turns into a circle for a couple of seconds, and that's it.Other games, like League of Legends, The Witcher 2, Civ 5, and Dota 2 don't have this issue. It's just a major bummer because I spent a lot of money on these games hoping that they would work on this newly acquired pc.

I have the following specs:

> Mainboard : ASRock Z77M

> Chipset : Intel Ivy Bridge

> Processor : Intel Core i5 3450 @ 3100 MHz

> Physical Memory : 8192 MB (2 x 4096 DDR3-SDRAM )

> Video Card : NVIDIA GeForce GTX 550 Ti

> Hard Disk : Hitachi HDS721010CLA330 ATA Device (1000GB)

> CD-Rom Drive : DTSOFT Virtual CdRom Device

> Monitor Type : BenQ BenQ G950A - 19 inches

> Network Card : Atheros Communications AR9285 Wireless Network Adapter (PCIe)

> Network Card : Realtek Semiconductor RTL8168/8111 PCIe Gigabit Ethernet Adapter

> Operating System : Windows 7 Ultimate Professional Media Center 6.01.7600 (64-bit)

> DirectX : Version 11.00

> Windows Performance Index : 1.0 on 7.9

I had initially installed windows x84 on it, and as I upgraded to x64, nothing changed.I have updated all of my drivers (I'm not exactly sure if I updated my sound card, since I can't really find it) using Driver Reviver, as well as the respective sites of the major components (such as my motherboard and my graphics card), but again, no changes.I have turned off UAC.I have attempted to run all of them as the administrator and with different compatibility settings (ranging from all the xp service packs to the vista service packs) I have reinstalled the games multiple times.My computer runs The Witcher just fine on high settings, I don't think my computer is too weak to run the games.