Windows 7 - BSODs while playing Starcraft 2

Hello, I've been experiencing BSODs while playing Starcraft 2. Here are the error reports, and attached are the dmp files and system report.

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 1033

Additional information about the problem:
BCCode: 1e
BCP1: FFFFFFFFC0000005
BCP2: FFFFF800030D1F6D
BCP3: 0000000000000000
BCP4: FFFFFFFFFFFFFFFF
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1

_________________________________________

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 1033

Additional information about the problem:
BCCode: 1e
BCP1: 0000000000000000
BCP2: 0000000000000000
BCP3: 0000000000000000
BCP4: 0000000000000000
OS Version: 6_1_7601
Service Pack: 1_0
Product: 256_1

- x86 (32-bit) or x64 ?
64 bit
- the original installed OS on the system?
yes
- an OEM or full retail version?
full retail
- What is the age of system (hardware)?
see below
- What is the age of OS installation (have you re-installed the OS?)
approximately 1 year

Here are my system's components and how long they have been in use:

OS: Windows 7 Professional 64bit (Service Pack 1)
CPU: AMD Athlon II X2 260 Dual-Core Processor (3.2 GHz) [in use since 9-8-2010]
Motherboard: ASUS M4A785-M [in use since 7-30-2010]
Memory: 4GB (2x2GB) OCZ Reaper 240-Pin DDR2 (Model OCZ2RPR800C44GK) [in use since 4-2-2010]
Graphics Card: GeForce 9800 GT [in use since 7-21-2009]
Sound Card: Creative SB Audigy 2 ZS [in use since 6-23-2006]
Hard Drive: Western Digital Caviar Black WD6401AALS 640GB 7200 RPM SATA [in use since 3-24-2010]
PSU: Rosewill RP500-2 500W ATX12V v2.01 Power Supply [in use since 6-23-2006]

One thing I've just noticed is that I am using a card that only supports Directx10, but I have Directx11 installed on my system.

Any help will be greatly appreciated. Thank you!