I dont know whether the 2 are linked but i will explain.....

For about 2 weeks now everytime i shut down my pc wants to update (i get that badge symbol on the shut down button). I didnt think nothing of it at first but 2 weeks of non stop updates? And they are very long updates that keep my pc on for 30-45 mins and this is when i got my first blue screen of death. On this occasion it said "pfn list corrupt" i didnt write down the code as i thought it wa just a one off.

But now i am getting the blue screen of death quite frequently mostly on the windows load up screen.....the last blue screen of death said "irql not less or equal" and i took down the technical code which is 0x0000000a (0x40595930,0x00000002,0x00000000x804e668d).

I think there is something seriously wrong with my pc so if anybody can help i would greatly appreciate it!!!