HDD ID Utility description
It will show your HDD serial number and other key information.

HDD ID Utility is a small application that will display in a single window information on your Hard Drive, CPU and Memory. The application will show you in what condition these items are at all times.


FEATURES:
- use a very small DLL to show the IDs of the HDD partitions and load them in the registry
- you can directly import function from DLL or you can read the key that was stored in registry by the program for you
- it is really small (the DLL size is only 15K)
- it is freeware
- it doesn't need to be installed/uninstalled

HDD ID Utility will show shows data about your computer's hardware:
Hard disk:
Hard drive ID (unique hardware ID written in IDE electronic/drive's chip)
Partition ID

CPU:
CPU ID (unique hardware ID)
CPU vendor
CPU running speed
CPU theoretic speed

Physical memory:
Memory Load ( Total memory used in percentage)
Total Physical ( Total physical memory in bytes)
Avail Physical ( Physical memory left in bytes)
Total PageFile ( Total page file in bytes)
Available PageFile( Page file left in bytes)
Total Virtual( Total virtual memory in bytes)
Available Virtual ( Virtual memory left in bytes)