PC DOES NOT WORK !!!!!!! – PLEASE READ !!!!!!!

Hello

When i start my pc its ask me on what mode i want to start it:

– SAFE MODE
– SAFE MODE WITH NETWORKING
– SAFE MODE WITH COMMAND PROMT
– LAST GOOD CONFIGURATION
– NORMAL WINDOWS

… and i tried all of them and none of them works.

I don’t know what can be happening but i installed a software 3 days ago and MAYBE that’s the problem. (i just paid $10 for it)

One more thing, i have a couple of things that are very important for me, so if you could find a way to not erase those things, i will appreciate a lot.

I really need hep wit this as soon as you can.

Thank you very much for taking the time to read this =D