Explorer uses %100 CPU

Sometimes when one has created customisations for the plugins one gets the coding slightly off and the plugins use resources like you see. This does not mean that is your case, though.

A sure way to find out if this is the case is to do this:
If you have changed only a skin of a plugin then try and change the skin to default or to one of the skins that came with the plugin. Do this one at a time.

If you have changed only an .ini file then delete that plugin for the moment and see what happens. If more than one is changed try them one at a time as in delete suspect #1 and check resources then leaving #1 deleted delete #2 and check resources etc. The thing to do is one at a time. Hopefully this way you will see which one is causing the problem.

It is possible to have what appears to be a correctly running plugin but actually having incorrect code running in it and it still "works".

Try this and let us know what happens. It is only necessary to do this experiment with plugins you have modified in any way.