Often, a blue screen should indicate an error name (with underscore characters) such as:
ERROR_NAME_TEXT
Only with such information is it then possible to assess what issues may be at play here. Often, a 'blue screen' issue can be very difficult to determine a specific cause (amongst many possibilities) that may or may not then be easily addressable.
Accordingly,
Your best option may be to try a system restore point (if available) to a date before any known problems or before you started performing any recent fixes?
Click on
Start>All Programs>Accessories>System Tools>System Restore.
Check
Restore my computer to an earlier date> Click
Next.
Choose the date before you performed any recent fixes and click
Next and
Next again.
REBOOT .
Otherwise,
Post a HijackThis log as per instructions found here (if possible):
Read This First - IMPORTANT Instructions