There are three likely sources for installation issues failing due to hardware:
- DVD-ROM drive
- Hard disk drive.
To rule out the DVD-ROM drive, you will need to swap it with one from another PC, and try the installer again.
To rule out RAM, restart your PC and download MemTest from HCIDesign.com. Run the application, follow the instructions, and then compare the results with your expected system specification (most easily found by right-clicking My Computer, selecting Properties and selecting the General tab).
Fully working system memory should not show any degradation – if it does, you will need to explore the option of purchasing replacement memory, especially if your PC is only just meeting the system requirements detailed above.
Finally, a hard disk drive problem can prevent successful installation – faulty sectors of the drive might result in the disk being much smaller than expected or required by the Windows installer. A fresh, fully formatted disk should be used instead.