The blue screen is usually caused by a driver issue that has stopped working. The best way to deal with this is to if you have added anything new on your computer a device make sure that the device is compatible as well as all the drivers installed and updated often you can go to Windows Updates and see if there are updates for your devices under the "Optional Updates" Once this has been completed all the updates installed. This should solve the issues with the blue screen. SP3 has caused a lot of problems on PC's. Depending on your operating system Win XP or Vista or Win 7 which in my opinion is a far better operating system than Vista because the new 7 is more programed to seek drivers out and find them. So it is most likely a driver issue of course without seeing your computer I can only guess here.
Also what may be the issue as well is the startup programs you have running may need to be cleaned out as well. I bet that your startup icons down in the right hand corner of the desktop are loaded down. You can find the startup programs really easy go to run and type in MSCONFIG go to startup items turn off "disable all but anti-virus software! :Disable do not delete. Click and restart and watch the computer startup faster. I clean mine all the time. I use a software program "Free" called ccleaner which you can download free no cost at ccleaner.com
Also get rid of the video players installed except Windows Media Player keep that one unless you have a remote for a TV tuner and software that goes with it keep those as well. I use VLC
player it has every media codec installed pretty much so that you will not receive errors when trying to load a DVD or a program video for school or homework etc. Also another thing to do is use spybot
search and destroy software This software goes and checks your computer for ad-are and spy-ware issues and allows you to get rid of those annoying issues. Please click on underlined links above.
Now last but not least you may want to check to see if you have any devices with an icon or symbol that is yellow in color in the devices section. For XP go to my computer on the desktop select properties. Then go to devices from there. In Win 7 select my computer icon right click on this then go to properties then go to devices top right hand corner of window. Select this and check to see if all the devices are running without any errors showing yellow triangle beside any of them. If so do a update drivers. Make sure that you select go online always for any updates.
Once you clean your machine and download the free software you should be running faster and cleaner maintain your computer with these simple free tools and run maintenance free I do. Thanks for using FixYa! Please post a comment for me if I assisted you. John