Blue screen haunting my brand new Netbook

Hi, tom's hardware community!

I'm here again because a strange problem with my new Netbook. I bought it last month. It's a Lenovo Ideapad S10-3, 2Gb DRR2 RAM, Intel Atom N550 and a 250Gb HDD, Win 7 Starter service pack1. The issue has happened twice, whilst I was net surfing: the system stops working, sends me a blue screen and then reboots (I have to power off the computer anyway after the rebooting because it freezes). Now I'll show you the detailed report that windows gave me, in both occations:

Firma con problemas:
Nombre del evento de problema: BlueScreen
Versión del sistema operativo: 6.1.7601.2.1.0.768.11
Id. de configuración regional: 13322

Información adicional del problema:
BCCode: d1
BCP1: 00000014
BCP2: 00000002
BCP3: 00000000
BCP4: 8894FBF2
OS Version: 6_1_7601
Service Pack: 1_0
Product: 768_1

Archivos que ayudan a describir el problema:
C:\Windows\Minidump\060811-19921-01.dmp
C:\Users\Alexander Neira\AppData\Local\Temp\WER-49857-0.sysdata.xml

I though it was the RAM, because I had some similar error when I had a bad memory on my desktop rig. However, each time I had this problem in the netbook, I was using an USB Optical Mouse (Genius brand, I don't know the model) that a friend lent me.

So, I don't really know. I hope you guys could help me. I'll really appreciate it.

Thank you!