2D game freezing

[BrainStorm]

My specs :

Asus K7V (1007 BIOS Rev., latest Via 4-1 Driver)
300Watts Power Supply
Slot A Athlon 550
128M PC 133 RAM
SB Live (Slot 2, Reserved IRQ 5)
D-Link 10Mbits (Slot 3, reserved IRQ 10)
AGP 4X Guillemot 3D Prophet (Latest BIOS, Det 6.50)

Win98, Windowsupdate Patched, DX8

Problem :

While in 3D games (Counter-Strike, Strike Force even Diablo II in D3D mode) there is no freezes. But after 5-10 min minutes of play in Simcity 3000 or Baldur's Gate, my comp crash. Most of the time, I'm able to move my cursor, the display is frozed and the music still play (SimCity) or the sound is looping(Baldur's Gate).

I tried :

Almost all versions of video and chipset drivers, slightly downgrading the video performane tab of Video acceleration, disabling Fastwrites in BIOS. And I dont have sharing/conflicting IRQ's.

Any help will be greatly appreciated.
Thanks

It's better to be rich and healthy than poor and sick!

 

[BrainStorm]

...I forgot to mention that I have disabled my Norton Antivirus Real-Time FS check, and even my ZoneAlarm firewall. I also have a DSL internet connection.

Thanks in advance.

It's better to be rich and healthy than poor and sick!

 

[BrainStorm]

Any suggestions?

It's better to be rich and healthy than poor and sick!