Please follow the steps given in the Link that PhilliePhan has given you and I must STRESS, HiJackThis is NOT a fix tool, it is a tool used to scan the computer. Yes, "some" fixes MIGHT be finally made using HJT but usually later, AFTER other tools are used. Please don't use it for fixing unless advised to do so.
What is the FULL message do you get when you get the Blue Screen?
Please don't download any other tools unless advised to do so...
These are the ones you need, and need to use them in the manner described in Phillie Phan's link;
HJT v1.99.1...renamed according to instructions on PP's link
AVG Anti-spy
do and Online Kaspersky scan.
Post back here with all of those logs AFTER following his instructions.
Judy