Blue laptop screen

[Annie_01]

My laptop stared turning blue when I power on it , the first time it did it was when I hooked up a pair of Bois speaker to it and it give an error message about adding USB devise then it did a self fix and freeze at the blue screen. Then after a day I turn it on and it ask how I want to restart and I choose normal and it came on and worked fine for a few days but then it continues to this several times when i power up. But no error messages everything seems to be running fan and light is on. I have power it down completely a couple of times and it worked some times not I am afraid i may damage it .
Recently while using it I received a message that my memory is almost full do u think it has anything to do with this problem?

Is it in sleep mood ? If so how can I change setting
I desperately need your help

 

[kenrivers]

You can check to see how much free disk space you have by right clicking on the drive in Windows Explorer and selecting Properties. To "cleanup" the drive you can click the "Disk Cleanup" button under the general tab. After doing that you can download and install something like Cleanup - http://www.stevengould.org/index.php?option=com_content&task=view&id=15&Itemid=69 or CCleaner - http://www.piriform.com/ccleaner/download. If you download CCleaner I recommend you choose the Piriform.com option. Both programs are free. If you need further assistance please let me know.