trouble with battlefield 2 restarting my PC

[Stugart]

hey guys,
i hope you can help me,
i got BF2 for xmas and i've installed it fine today, (even though a few weeks ago i installed the demo and it did the same thing)

but when i click on play BF2 (any icon or method) to load, i get a black screen
monitor clicks (a flash of the desktop screen) then it restarts my machine. i'm baffeled as to what i can do to fix this? has any one had the same issue?

heres what i've tried to do.
installed with no patch - same result
installed and patched - same result
change desktop resoultion - same result
over clockd my cpu - same result
formatted and reinstalled xp - same result.
uped my power supply voltage 5% - same result
the v/c core temp is 56C
changed hertz from 60 to 70 - same result.

i have on the odd occasion say every 10-15 attempts of launching the game it will work, i register my details, then i find a server and click join server - same result

i've turned off all virus scanners, anti spyware etc. - same result

heres a code from an error report i get sometimes
BCCode : 100000d1 BCP1 : E2B4B3A4 BCP2 : 00000002 BCP3 : 00000000
BCP4 : F7B98AD2 OSVer : 5_1_2600 SP : 2_0 Product : 256_1

heres my PC specs
AMD ATH 2500+
1G ram
XFX 6600GT 128MB AGP
8MB 80G WD HD (45G free)
i have the latest drivers for my card and motherboard..
480W antec tru power PSU ESI PRO S/C
any ideas guys i'm getting deperate
thanks in advance.
Stu

[Nix]

Do your specs match

System Requirements

1.5Ghz Processor
512mb RAM
128mb Graphics card (needs 1.4 shaders)

[Nix]

More detaile

System Requirements

The following requirements are listed in the Battlefield 2 Read-me file.

Operating System
Windows XP (32 Bit Version)

CPU
Battlefield 2 supports the following processors:
Intel Pentium 4
Intel Xeon
Intel Pentium Extreme Edition
Intel Celeron D
AMD Athlon XP
AMD Athlon 64
AMD Athlon 64-FX
AMD Sempron processor

Minimum Specification:
CPU: 1.7 Ghz
RAM: 512 Mb
Video Card: NVidia GeForce FX 5700, ATI Radeon 8500 or ATI Radeon 9500
with 128 Mb of RAM

Recommended Specification:
CPU: 2.4 Ghz
RAM: 1 Gb
Video Card with at least 256 Mb of RAM

Video Cards
Battlefield 2 only supports the following video cards:
Radeon X700 (PCIe)
Radeon X600 (PCIe)
GeForce 6600 (PCIe)
GeForce PCX 5900 (PCIe)
GeForce 5800 Series (AGP)
ATI Radeon X800 XT Platinum Edition
ATI Radeon X800 PRO
ATI Radeon 9800 Series
ATI Radeon 9600 Series
ATI Radeon 9550 (RV350LX)
ATI Radeon 9500 / 9700 Series
ATI Radeon 8500 Series
ATI Radeon X300 Series
NVidia GeForce 6800 Ultra
NVidia GeForce 6800 GT
NVidia GeForce 6800
NVidia GeForce FX 5950 Series
NVidia GeForce FX 5900 Series
NVidia GeForce FX 5700 Series

Hard Drive Space
To install Battlefield 2 you will need approximately 2.3 GB free
hard disk space, plus space for saved games. Additional space is
required for DirectX 9 installation.

In addition to the installed game, Windows will require additional
free hard drive space for its operating system (virtual memory).

If you encounter the following message in an error dialog:

"Ran out of virtual memory"

Free up some more hard drive space.

Improving Gameplay Performance
Some machines will benefit from experimenting with your
Network / Video / Sound options:

- INTERNET / NETWORK PERFORMANCE

This section is very important to experiencing good internet play!

- JOINING MULTIPLAYER GAMES:
To get the best performance on your computer we recommend
you follow these guidelines:

- HARDWARE
Minimum system - Join servers that have up to 16 players

Recommended systems - Join servers that have up to 32 players

High end systems - Join servers that have up to 64 players

- BANDWIDTH
ISDN users - Join games with a maximum of 16 players.

ADSL/Cable users - Join games with a maximum of 32 players.

T1/LAN users - Join games with a maximum of 64 players.

[Nix]

From http://www.totalbf2.com/game/requirements/