Crap. I wat to update to 1.3... Of no! Nothing works!

Okay people, My question is,

What do I do when it says failed to launch trying to update to 1.3. To make it more simple. I am on a PC. So I go to minecraft launcher, I click login and and click yes. It says failed to launch. I open up the launcher again and lick on options and click force update. Tried again. Said failed to launch. So I am thinking of asking you guys. Please answer me... I might play your map and subscribe! Thanks. Just comment me in the PMC comments. Thanks!