Problem withh Internet Explorer

Hi everebody
I am having trouble with my Internet explorer.It is doing some very odd things.Sometimes it will completely close the page i am visiting for no reason or it will be very slow loading pages and when i say slow i mean very very very slow for eg i tried to google something and after 10 minutes of the page trying to load i gave up.I thought that it was perhaps the topic i was searching so i tried putting in random things to see if that made any difference but it didn't.
Another problem i had was when i was on a forum and clicked on a link and nothing happened i tried to open a new tab and that wouldn't work either and it would let me access any options that are in my tools menu.i had to restart my computer.Just to let you know i have high speed Internet connection.Thanks in advance to anyone that helps me with this problem.
Thanks a lot