Unable to play several games after updating DirectX?

Recently, several games on this laptop (Lenovo 3000 N100 with Windows 7 64-bit) that worked previously have become unplayable. Either they don't open at all, or they do open, but I see a black/clear screen. I think the problem is with my graphic drivers, because I can play the games by enabling the "256 color" and "Play in 640x480". Anyway, the problem started occurring after I tried to update my DirectX version and my graphic cards to play a new game (This war of Mine), which included updates to DirectX that I used. After that, my DirectX version updated to 11, but now I'm unable to play several games. I've tried uninstalling and reinstalling my graphic drivers, but I haven't had any results.

The graphic diagnostics from dxdiag:
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Card name: Mobile Intel(R) 945 Express Chipset Family
Manufacturer: Intel Corporation
Chip type: Intel(R) GMA 950
DAC type: Internal
Device Key: Enum\PCI\VEN_8086&DEV_27A2&SUBSYS_206217AA&REV_03
Display Memory: 256 MB
Dedicated Memory: 0 MB
Shared Memory: 256 MB
Current Mode: 1280 x 800 (32 bit) (60Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: unknown
Monitor Id: AUO1344
Native Mode: 1280 x 800(p) (60.002Hz)
Output Type: Internal
Driver Name: igdumd64.dll
Driver File Version: 8.14.0010.1930 (English)
Driver Version: 8.15.10.1930
DDI Version: 9Ex
Driver Model: WDDM 1.0
Driver Attributes: Final Retail
Driver Date/Size: 9/23/2009 19:22:58, 5472256 bytes
WHQL Logo'd: Yes
WHQL Date Stamp:
Device Identifier: {D7B78E66-64E2-11CF-9073-6800A2C2C535}
Vendor ID: 0x8086
Device ID: 0x27A2
SubSys ID: 0x206217AA
Revision ID: 0x0003
Driver Strong Name: oem1.inf:Intel.Mfg.NTamd64:i945GM0:8.15.10.1930: pci\ven_8086&dev_27a2
Rank Of Driver: 00F42001
Video Accel: ModeMPEG2_A ModeMPEG2_C

Operating System: Windows 7 Ultimate 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.150525-0603)
Language: English (Regional Setting: English)
System Manufacturer: LENOVO
System Model: 0689A6U
BIOS: Ver 1.00PARTTBL
Processor: Intel(R) Core(TM)2 CPU T5500 @ 1.66GHz (2 CPUs), ~1.7GHz
Memory: 4096MB RAM
Available OS Memory: 3062MB RAM
Page File: 983MB used, 6670MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 64bit Unicode

Direct3D: 0/4 (retail)
DirectDraw: 0/4 (retail)
DirectInput: 0/5 (retail)
DirectMusic: 0/5 (retail)
DirectPlay: 0/9 (retail)
DirectSound: 0/5 (retail)
DirectShow: 0/6 (retail)

Were you playing the games with the on-board GPU? Do you have a secondary GPU possibly not-listed in specs?

I've only got the integrated GPU.

Any system restore points to a date prior to installing DirectX?

I've tried restoring to the earliest point possible, and it's odd, but the point's over a few months ago when I first go this laptop, well before the updating of DirectX and when the problem first started, but it's still not working.

Then I guess this is more than a DirectX issue and perhaps it was coincidental.

Can you go into BIOS (Setup menu as you boot laptop) and check for any GPU related entries? Try to increase dedicated/shared memory for GPU if possible (sometimes there is no options). If nothing there, try loading defaults (either first screen or exit menu) again in BIOS.

I tried to find something related to the GPU in the BIOS Menu, but I couldn't find anything, I'm afraid. I did set all my options to default, but I'm still having the same results.

Can you show/post a tutorial on how to uninstall DirectX? I tried Googling it a few weeks back, and most of the official support sites said that it was impossible to uninstall it, and the software they recommended didn't help as it kept trying to reinstall the most current version of DirectX, which is 11.