Photoshop fixes or alternatives?

My photoshop has stopped working, it says "photoshop has stopped working" literally.  When I look at the details it says the problem is "APPCRASH", whatever that means.  So I have uninstalled and reinstalled, tried a copy of an older version and a couple "fixes" from online but it's still being a big piece of shit.  Suggestions?

Now, if I can't fix it I need an alternative. I have gimp downloaded and playing with it a little...CRAP.  Photoshop is too expensive, I can't afford it right now.  I need another option.  I have heard SAI and Sketch book pro.  Are there others? Which one is good??

I could use some advise if anyone has some experience with either one or has an alternative.