pc freezeing

my pc keeps freezeing every 30 mins for about an hour the proces thats freezeing it is the winlogon.exe proces and is use 99% of the cpu how can i fix this? i can end the task because windows wont let me any advice will be helpfull and if any one could say what procces should be running please tell me so i know what to delete

 

winlogon.exe is the main process i think. maybe you need more RAM or too many Programs are up and running

 

Winlogon.exe is a system task, and should only be taking up about 1500k memory usage. How do you know that it's this process? I doubt that a system process would be slowing you down so much. It's more likely ment to be a User initiated process.

 

^agreed