Barry
Please allow 2/3 hours for the system to run before uploading further information so that the impact of making changes can become apparent. Restart your computer twice during this time.
Please upload and share with everyone fresh copies of your System and Application logs from your Event Viewer to your Sky Drive and post a link here. You can remove the earlier copies of the logs from your Sky Drive.
To access the System log select Start, Control Panel, Administrative Tools, Event Viewer, from the list in the left side of the window select Windows Logs and System. Place the cursor on System, select Action from the Menu and Save All Events as (the default evtx file type) and give the file a name. Do the same for the Applications log. Do not provide filtered files.