I just got a new computer yesterday and I also have been having this problem - the friendly and enemy icons flicker between red/green and gray/white. . .
its odd because this computer is better - stronger in everyday to my previous laptop. . .
while i agree that dell is not the way to go for desktops, my computer is a research gift from the Japanese government, and they do not accept 'home built' computers.
Current computer:
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System Information
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Time of this report: 1/25/2013, 00:46:26
Operating System: Windows 7 Professional 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.120830-0333)
Language: Japanese (Regional Setting: Japanese)
System Manufacturer: Dell Inc.
System Model: Inspiron 7720
BIOS: Default System BIOS
Processor: Intel(R) Core(TM) i7-3630QM CPU @ 2.40GHz (8 CPUs), ~2.4GHz
Memory: 8192MB RAM
Available OS Memory: 8048MB RAM
Page File: 3491MB used, 12604MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: 96 DPI (100 percent)
System DPI Setting: 120 DPI (125 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 32bit Unicode
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Display Devices
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Card name: Intel(R) HD Graphics 4000
Manufacturer: Intel Corporation
Chip type: Intel(R) HD Graphics Family
DAC type: Internal
Device Key: Enum\PCI\VEN_8086&DEV_0166&SUBSYS_05781028&REV_09
Display Memory: 1696 MB
Dedicated Memory: 64 MB
Shared Memory: 1632 MB
Current Mode: 1920 x 1080 (32 bit) (60Hz)
Monitor Name: 汎用 PnP モニター
Monitor Model: unknown
Monitor Id: CMN1720
Native Mode: 1920 x 1080(p) (60.002Hz)
my previous computer ran with a 512 graphics card and a weaker chip. . this one can switch between its Intel HD Graphics 4000 GPU and Nvidia GeForce GT 650M GPU with 2GB of VRAM. . .not ideal, but sadly I have to play out of laptops till I settle.