much about the system you have, it will mostly be guesswork.
If you cannot see the request in red font above each post window asking for system specs and details of the problem, please tell us so we can report the fault to the Forum Admin.
In the meantime my guess would be;
1] Do a complete scan of your system with your anti-virus and anti-spyware applications, and
2] Google BHO's, and remove them all from Internet Explorer.
My system is slow especially when I first log on to Internet Explorer! I have defragged and also cleaned up my cookies. Any other suggestion would be greately appreciated!