Thanks for the replies.
The computer no longer seems to be crashing but the memory still seems to be used up and the computer is slow and struggles badly when attempting to use more than 1 program.
Done all that Budapest recommended. That doesn't seem to have fixed it. I'm not sure it is directly a Firefox problem as i have tried using other programs on their own such as IE and media player etc for example and all go through a similar pattern. No matter what program i am using it seems to hog the CPU percentage which i don't think is right. I don't have an awful lot of memory on my computer but i don't think it's that small to be causing this affect? Didn't seem to over the past year or 2 anyway.
I looked at the HiJack this forum for the guides of anti-virus/anti-spyware programs to try and went through most of them, caught a few trojans and some ad aware but nothing to fix this.
I'll try the other forum you mentioned though, thanks. One other fault i've been noticing, not sure if it's anything to do with this or not but:
When i'm shutting down i always get a popup saying 'Windows Cannot End This Program - c:\windows\system32\cmd.exe' forcing me to pick end this now.
Thanks again for the replies.
Edited by Dr. Cox, 28 September 2008 - 05:58 PM.