I think i messed up my computer:(

I need help! I've been a new mac convert for about a year now. Still don't know how to do a lot of things. Anyway, a big storm rolled in last night, so i shut down my imac. when shutting down, it asked if i wanted to update. I said yes and it started to run auto update when i lost power and the machine shut down. Next morning, everything boots up and runs fine except i when i try to watch a movie preview on applemovietrailers, quicktime says i need to update. Then I check itunes and it won't open either. when i click on it it says it had to close unexpectedly. I tried reinstalling both quicktime and itunes, but the same thing keeps happening. I finished all the updates this morning as well. I even went to finder and deleted all files having to do with qt and itunes, then reinstalled. same issue. then i followed the uninstall for itunes for all files related to itunes from the apple support. then reinstalled itunes. still no go. Any suggestions? I would just revert to previous backup, but that was 8 months ago (we moved the office and i stupidly didn't hook up timemachine again). Anyway, we would lose a lot of pics if we revert back 8 mo so that is a last resort. Calling all brilliant Mac peeps! Please help!