When are you getting the
Blue Screens?
Usual internet use - playing games - watching videos?
Caused By Driver : ntoskrnl.exe is generic error and is not telling us much.
Some reasons for
Blue Screens
New hardware - Software installed.
Device driver - Video driver - corrupted - faulty.
Faulty Ram - Overheating - Dying hard drive etc.
Check Device manager - a driver may need updating.
Click the + sign against all entries to expand what is listed.
Look for exclamtion marks.
How to access Device Manager.
http://www.computerhope.com/issues/ch000833.htm
Always update drivers from the manufacturers website
Run a Mem Test.
http://www.memtest86.com/download.html http://oca.microsoft.com/en/windiag.asp
Download the ISO file from one of the links above to your desktop.
Then burn the ISO to a Cd.
Start the Pc using the Cd and run the memory test overnight or for at least 8 passes.
It is best to run a full scan on individual Ram sticks if you can.
Or run the test but if any errors are shown - then remove all sticks of Ram and test each Ram stick one at a time.
Guide to using Memtest86+
http://www.bleepingcomputer.com/forums/topic207910.html
-----
You can also run the Mem test from a USB stick
http://www.memtest.org/#downiso
Scroll down to [Download (Pre-built & ISOs]
Download -
Auto-installer for USB Key (Win 9x/2k/xp/7) *NEW!*
----
Hard drive test.
http://www.seagate.com/ww/v/index.js...001a48090aRCRD http://www.tacktech.com/display.cfm?ttid=287
----
Overheating - check temperatures
http://www.cpuid.com/softwares/hwmonitor.html http://www.piriform.com/speccy