Kernal_data_inpage_error

Hi guys

Running a relatively new Vaio on Windows 8 and a blue screen just popped up saying that an error had been detected and that my laptop had to restart, it said to find more info on why this happened I should look for KERNAL_DATA_INPAGE_ERROR on the internet.

Any ideas as to what happened and how serious this is?

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 8, 64 bit
Processor: Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz, Intel64 Family 6 Model 58 Stepping 9
Processor Count: 4
RAM: 8139 Mb
Graphics Card: AMD Radeon HD 7550M/7650M Graphics, 1024 Mb
Hard Drives: C: Total - 923659 MB, Free - 866856 MB; E: Total - 953867 MB, Free - 703192 MB;
Motherboard: Sony Corporation, VAIO
Antivirus: Windows Defender, Disabled

My antivirus is Norton 360 in case you're wondering why it says Windows Defender is disabled.

Since this happened last night I have also had an error message say there was a RunDLL error when I restarted my laptop.
And I also have had another blue screen saying my laptop needs to restart because of the following error - DPC_WATCHDOG_VIOLATION

Any help would be massively appreciated!

It's now done the DPC_WATCHDOG_VIOLATION error twice now