It looks like the computer crashes while in sleep mode. Here are a few error reports:
Problem signature 10/8/09
Problem Event Name: BlueScreen
OS Version: 6.0.6002.2.2.0.256.1
Locale ID: 1033
Problem signature 10/2/09
Problem Event Name: BlueScreen
OS Version: 6.0.6002.2.2.0.256.1
Locale ID: 1033
xtra information about the problem
BCCode: 7a
BCP1: C0600028
BCP2: C000009D
BCP3: 30198884
BCP4: C0005400
OS Version: 6_0_6002
Service Pack: 2_0
Product: 256_1
Server information: 0dc87d5f-64a1-4fe6-86f1-5a379cac0af0