PC keeps freezing

[Craftsue]

My PC has started freezing within a minute or two of logging on. I've done a full scan which took hours but didn't throw up anything. As a 'mature' user with virtually no technical/computer knowledge, I need help please in simple laymens terms.

 

[Saga Lout]

Try starting into the Safe Mode with networking by tapping Function 8 when you power up the machine. That opens Windows with fewer add-ons and drivers so it becomes easier to eliminate possibilities. See how long it can stay on, if it makes a difference when you go online and press Control Shift and Escape together to bring up the Task Manager. Click the Processes tab to see what is using the processor resources and keep an eye on those figures.