There are specific codes that you get with the blue screen error
Like STOP: 0*0000.....
There may be some drivers listed which are causing conflicts like:
windrv.sys,etc.
One should always note down such codes.
You can search for these codes in the link mentioned in the above post.
It has been discussed many times, check these links to see which one matches your problem:
Link 1
Link 2
Link 3