Hi, thanks for your reply.
1- Its probably been about 2-3 months since i know that everyhing was working correctly, so i cant be 100% sure. There has been no new HW, i have deleted the software i D/L and had installed. No new browser updates. No virus/malware alerts or infections found during scanning. No errors. Theres probably been a few windows updates but because of the length of time that has past, i cant restore back to that point.
2 - I just started it in safe mode and it was normal. CPU under 5%. Does this mean its not a driver or hardware problem?
3 - Yes, i know. I will be installing new software ASAP. This is the thing i cant understand. I unitnstalled AVG yesterday and the system went back to normal straight away. However, it reverted back to the high CPU when i started it today.