CD/DVD just stopped working.

Have you considered checking your DVD writer? Also, you might already have a faulty hard disk drive.
You can try any of the following:
1. Double check to see if your Windows 7 installation disk is dirty (clean it using a lint free cloth) or has many scratches. (Your DVD reader/writer would really have a hard time reading scratched disks.)
2. Borrow another DVD-ROM from a friend and use it to install Windows 7 on your computer's C drive.
3. Check to see if ALL cables are properly connected. i.e. SATA, power cables, etc.
4. You could also try to make your 500 GB HDD as a slave drive so that you can backup your files to another media if it works. (Backup to another external hard disk drive, burn it to DVD's, etc.)
5. LISTEN carefully if your hard drive makes unusual noises like unusual clicking, bumping, and/or scratching sound inside your hard disk drive. If it does and as a last resort, replace your hard disk drive.

to fix the problem you must open your laptop check the hardware inside of your laptop hardisk thats the problem try to unplug cables of hardisk to plug again or replace new hardware hardisk if not solve the problem

You have two separate questions.

1. I have a Quantum hard drive which got a burn on one of it chip on the green part it is from an IBM aptiva 95 all of my data is on it .

Unless you can find an _identical_ hard-drive, and disconnect the electronics from that disk-drive, and then connect the electronics to your hard-drive, your data is "lost". Or, find a "Data Recovery Service" -- for a large fee, they will repair your disk-drive, just long enough to burn a bunch of CD/DVD disks to hold all the "data".


2. I have onother that I have accendentally delete one of the partition which is the C drive

Download the "Partition Tool Editor" by the PowerQuest PartitionMagic people (now owned by Symantec):

ftp://ftp.symantec.com/public/english_us_canada/tools/pq/utilities/ptedit.zip

Unzip the file, and, while the "accident-prone" disk is connected ot your computer, run 'PTEDIT.EXE' to change the Partition Boot Table, to "undelete" the partition. It's *NOT* a tool for "novices" -- think carefully before making any changes to the Partition Table.

The only way to change from NFTS to FAT32 is formating the hard disk.
You will have to install everything again after format it.