0x80070002 Error Can't Start Computer

I recently have had major issues with my HP pavilion dv6 laptop. I bought it about a year ago, and it has worked reasonably well until now. I downloaded some iso files, and I wanted to run them, because they were an old game that I really liked of my friends, but he sold it. I tried to copy it onto a disk, but the disk was playing up, so I downloaded DAEMON tools lite so that I could install it. I then had to restart the computer, as you have to with new software, and It seemed fine. I then turned on the computer the next day, and the CHKDSK program ran. I didn't worry about this too much, it happens occasionally.but when the computer started up properly; it wouldn't run any programs. when I tried to get things to go, it would always come up with a balloon in the corner saying that the file system structure is corrupt or unusable, please run CHKDSK on file system C:. So I did. The next day(today), everything worked fine. I could do just about everything. I told CHKDSK and the memory diagnostics tool to run while I was at school. I didn't notice anything bad at the time. Everything worked when I got home from school; except that most of my gadgets had no writing on them, which concerned me a little, and some of my startup programs didn't start.