Download/install BlueScreenView, http://www.nirsoft.net/utils/blue_screen_view.html
Double-click BlueScreenView.exe file.
When scanning is done, Edit/Select All
...then File/Save Selected Items
Save the report as BSOD.txt.
Open BSOD.txt in Notepad, copy all content and paste it into your next reply
I suggest that you also employ Event Viewer and take a look at the errors reflected there...for clues as to what needs your attention. I am not suggesting that you post your Event Viewer logs here...I am suggesting that you...look at the errors and do the investigative work that any user should do for her/his own system. The detail for any error may be seen by double-clicking that line item.
How To Use Event Viewer - http://www.bleepingcomputer.com/forums/t/40108/how-to-use-event-viewer/
System manufacturer and model?
What browser and version are you using?
Is the system current with critical updates for XP?