Macbook Pro will not start up

My Mac Pro took a pretty good bump a month or so ago. After taking the hit, it would freeze up quite often, but would always get back on track after a short while. Now, it is refusing to startup altogether - on both partitions of the hard drive. In the top left of the screen, I get message "panic(cpu 0 caller 0x47f5ad): "Process 1 exec of /sbin/launched failed, errno 5\n"@/SourceCache/xnu/xnu-1504.15.3/bsd/kern/kern_exec.c:3145". There is other information in the top left, but it all looks like numbers, letters and symbols. In the center of the screen, message "You need to restart your computer. Hold down the power button until it turns off, then press the power button again." in about 5 languages. Could I have damaged my hard drive? Thanks in advance.