100% CPU Laptop

[NickM]

Vista 32 HP, Dell XPS 1330.
Whenever I unplug my laptop power cable then plug it back in my CPU useage jumps to 100% and stays there till I restart.
Why does it do this and how can I make it stop!

 

[bledd]

screenshot of 'show processes from all users' in task manager

 

[NickM]

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