On thursday my 2 year old son got frustrated while watching Dora The Explorer on my Laptop (yeah, the tantrum throwing years), and threw my laptop on the ground. Needless to say, I got error while trying to boot it up afterwards. I suspected that my harddrive may be damaged...or sectors corrupted however I tried to reinstall the software with the recovery discs I had burnt when I just got the system (Packard Bell). The computer comes with a ghost drive with the OS written on it for recovery so I was prudent enough to burn the OS to disk...OS is Windows Vista Home Basic. When I tried to recover the disk the recovery halted midway...I decided to install Windows 7 Ultimate on it instead...so I formatted the C drive and installed Windows 7. It is installed fine and I can use the internet and install some softwares, including upgrading drivers for said brand. The problem is, I cannot install Microsoft Office Suite nor Nero (latest version). Everytime I try to install it I get error or the computer freezes. Same thing with Nero. Can someone explain to me why this is happening? I really need to install Office as I have some very important research to complete. Second, will replacing the hard drive solve this problem? What is the best action to take?