look at the graph you screen shot and as soon as it goes to 100% click on processes and the top tab labelled apps is what you have running somewhere on your pc. as you say it takes ages to boot up I suspect you have something in msconfig/start up menu that is doing the damage , look in the list of items in start up menu , do you have things you don't want to run at start up or even things you don't recognise. Also , windows sometimes leaves items in start up menu AFTER you have deleted something . When this happens your pc will hang or run slow as it is trying to find the program related to the entry. Finally take a look in add/remove you could have unknowingly installed something that is running in the background.
What is Markdown?
Markdown lets you add more formatting to your post. Simply type in your post and it will display as written.
If you wish to add bold or italic characters, add a hyperlink to another website, a heading or a horizontal line, simply use the relevent icons above the text input field.
A preview of your post will appear in the grey box below. If you make a change and you're not happy, simply press the back arrow icon to undo.