Firstly i take it this pc is brand new,if so should carry a guarantee of a year at least.So send it back !!!
Backing up your data/settings is easy to do with something like Acronis TI 10 about £25.00 from Amazon delivered.This will create an image of everything on your harddrive,then save this image to discs or an external harddrive.
Though if you use Acronis,i doubt it will run properly with your system as it is at the moment.So for now,try and copy your data/photos etc to disc as backup.
Then we need to address the problems.
First thing to try:
Boot into safemode (tapping F8 onstartup) and use Last Known Good Configuration then boot into windows.
Or System Restore to a date the pc was working ok.
These two options are the first port of call when dealing with similar problems.