Bsod

right heres the thing i first experienced the BSOD a few weeks ago, i suspected it to be a critical system file corruption as safe mode crashed too.
i managed to recover the hdd using hp's system recover. fresh install of windows. great.
1 1/2 hours after install BSOD.
but this time i noticed it happened more frequently if i opened the laptops screen after shutting it or when i shifted the laptop a little. also i noticed that after rebooting the system would go really slow, as if i had only half the RAM. so this lead me to suspect the RAM had come loose from when i had had it repaired late last year, (complaints of poor workmanship by repair company), did that last night and then got another BSOD on boot. so i ran all the bios tests i could and it passed every single one of them. booted up, and works great as a test i started a download i know it wouldnt finish before i woke up. during the night, 1:11a.m GMT to be precise it crashed.
sorry for all the backlog of info.
BTW i ruled that the repair i had it go in for isnt the problem apart from things not being put back right. because originally the repair had to be done as my hdd corrupted and i couldnt even restore like i did this time

btw its a HP Pavillion DV7 laptop; 4GB RAM, AMD turion(tm) II ual-Core Mobile M520 2.3 GHz, ATI Mobility Radeon HD 4530 series.


i will include the dump files as soon as i can