PatPlays27

Have been playing this game for some time now, different computers all running windows XP. Recently on one computer (a Gateway with 2 installed cd-drives) I have had a problem - I can play for about 3 minutes & then the game locks and I have to do a cold boot to get out of it. I bought a new copy of the disk to see if that would resolve it, but problem continues.
All patches have been installed & neither Blizzard or Gateway has been able to help me - any ideas?

My Computer Information - General
Gateway
System Model: N0CPP074
BIOS Version: American Megatrends Inc. 0AAWVP09
Operating System
Microsoft Windows XP Professional
Version: 5.1.2600
Service Pack: 1.0
Location: C:\WINDOWS
PID: 55274-640-0592156-23978
Hot Fix: Q819696
Memory (RAM)
Capacity: 512 MB
Processor
AMD Athlon(tm) Processor
Version: x86 Family 6 Model 4 Stepping 4
Speed: 1400 MHz
General Computer Info
System Name: PAT
Domain: HOME
Time Zone: Central Daylight Time
Connection: Workstation (standalone)
Proxy Server: Auto
Local Disk
Total Capacity: 149.06 GB
Sum of Hard Disks: (C: F: )
Used: 22.71 GB
Free: 126.34 GB