I/O Error Status 0x0000185 – Application Error

I’ve got black screen and a blinking cursor with an error “The instruction at 0x73add9a5 referenced memory.”
Please read the whole message before you reply. I’ve been searching on Google for the past five hours seeking for an answer but no one are assisting at all. I used a Compaq Presario CQ61 running Windows Vista Home Premium OS. I used to download TV series/movies & songs. And this morning I was downloading a series of “Lie to Me” after I left home, I came back and the laptop had turn off because the battery was empty. And then I turned it on. It performed nothing. After I tried to log in, I just saw a black screen with a cursor.
After that, I have opened the task manager a lot of times, and it shows an egg timer cursor and does nothing. I have also tried the command prompt under safe mode operation but it didn’t run. Nothing is functioning AT ALL. I made a diagnostic restart; I found an error message when it restarted:
explorer.exe – Application Error
The instruction at 0x73add9a5 referenced memory at 0x73add9a5. The required data was not placed into memory because of an I/O error status of 0x0000185. Click OK to terminate the program.
Also, I was searching Google for this error but nothing looks to be related. Please help. I can wipe the hard disk of my computer but do not want to drop all my music & pictures. Thank you so much.
