So this is my first post here ,but I have been reading the forum for a couple years and I'de like to say thank you to everyone for some great information. But now I am stuck, and I have read and read and read and cannot fix my mba...heres the situation: about a month ago I was getting periodic freezing (spinning cursor, movable but cannot click anything& key strokes dont register). At the same time, I was getting errors saying my hard drive had/is failing. Tried a lot at this point but decided to replace the drive with runcore's 128 SSD. I have that drive partitioned into a 25gb partition for snow leopard & applications, the remainder is my data drive. Here are the symptoms I have now: -spinning wheel freezing, requires hard reset -- upon reboot it stalls & flashing the file folder with a "?" (indication that its not finding the OS) -to get it to restart I have to let it sit for 10min - 2 hours WITHOUT the power adapter connected, reset the SMC & pvram, connect the power & boot -when it runs, it run GREAT, but pretty much every restart stalls out. However when it does start it takes a good amount of time for the apple logo to show on the gray boot screen, but once it does its only about 10-15secs before its fully booted & ready to use. from what I have read I think there is an issue with either the SMC or EFI & i have tried upgrading the firmware for both, but both packages say "this computer does not need this update" (i tried every version of both for all 3 versons of the mba. so.....im at a loss, any suggestions (other than bring it into apple) would be awesome! Thanks in advance for your help.