Problem with black screen and crashes after installing windows 7 and bootcamp

Question

K, so I partitioned my internal HD using Bootcamp, installed a new copy of Windows 7 Home, put in my Mac OSX disk and installed the additional stuff. I can successfully log in to Windows and open the browsers I have installed: Comodo dragon and Mozilla FF. McAfee auto installed with FF and I have Comodo Antivirus installed.
However, within minutes of use, my screen goes black, the computer does not shut down and reboot, I have to press the power button and wait a few secs for it to shut down then reboot. This has happened from both browsers while in Windows on Facebook in a game; while trying to save an attachment from an email via webmail and also while checking the inbuilt Windows settings for the display.
The latter produced the following report (below) on reboot and when I hit the "look for a solution" button, the actual window vanished after a few secs.
2 additional bits of info which may or may not be related:
a) running windows troubleshooter I discovered I have prob with:
driver for Inter (r) 5 series /3400 series chipset Family USB Universal Host Contoller - 3B3B
- I Googled this and it seems a common prob. Tried the reinstall, didn't work, so disabled it as suggested on some of the forum posts.
b) The OSX side of my computer seems to run fine most of the time, tho I have had the odd back screen, then wait, press reboot to power on and off in past as related in this post last month: https://discussions.apple.com/thread/4844797 (maybe a kernal panic..???)
Would anyone know what is causing these probs or what I can do about them? My computer is no longer under warranty and the couple of times I had probs while it was, I was told the probs were to do with the power supply and given a new one, I'm not sure if they looked at the logic board. The OSX side has also had an ongoing prob to do with sudden shrinkage of the image content, which I mentioned to the geniuses at the Apple store b4, but as it wasn't acting up there they couldn't do anything about it... ( looks as tho sm1 changed the screen resolution and whatever is in the browser window shrinks, tho desktop, is never effected - if that makes sense!.) 
All in all tho, does make me wonder if the prob is based in the graphics switching..???
Problem signature:
  Problem Event Name:    BlueScreen
  OS Version:    6.1.7601.2.1.0.768.3
  Locale ID:    2057 Additional information about the problem:
  BCCode:    333
  BCP1:    0000000000000001
  BCP2:    0000000000000002
  BCP3:    0000000000000003
  BCP4:    0000000000000004
  OS Version:    6_1_7601
  Service Pack:    1_0
  Product:    768_1 Files that help describe the problem:
  C:\Windows\Minidump\032413-20872-01.dmp
  C:\Users\KittyH\AppData\Local\Temp\WER-166952-0.sysdata.xml Read our privacy statement online:
  http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409 If the online privacy statement is not available, please read our privacy statement offline:
  C:\Windows\system32\en-US\erofflps.txt 

Answer 1

When booting up hold down the option key and pick the Mac startup disk.  To make it automatic, once in your Mac side go to preferences, startup disk and pick the Mac disk.  Next time you boot up it will boot up to Mac OS.