First prob - in My Docs click on Tools and then Folder Options. In the View tab make sure "remember each folder's view settings" is checked.
Second prob - not exactly sure what you mean here. Can you give more details? Have you checked that whatever it is that you are having to restart isn't set to time out after a certain time?
Third prob - are you using Internet Explorer? You could try downloading Mozilla Firefox. Many ABers use it, it seems to be more reliable. What I think may be happening is that a one or more processes are running in background. Next time it happens right hand click on the bottom tool bar and click on Task Manager. If you then click on the Processes tab and sort by clicking on Mem Usage it will give you an idea of which program is using up alot of processing capacity. If its Internet Explorer, switch to Firefox and see how you get on.