We are going to need a lot more info that that. Please fill in your system specs in the lower left corner of your posts.
Next type eventvwr in search>goto windows log>application tab. Look for errors (they have red in the left hand column) that have app hang, app crash, or CS3 in them.
When you find them (there is alot of data) use the built in snipping tool to make a screen shot, and the attachment icon (shaped like a paperclip) in the reply form