You can save externally a backup image and reimage to the new computer HD using Acronis 10+ with Universal Restore which removes the drivers and prepares it to start on new hardware.
You can also save image and reimage using Windows 7 backup imaging or free Macrium Reflect, then before starting the new HD, run Paragon Adaptive Restore CD to do the same thing. Backup Complete Computer - Create an Image Backup System Image Recovery http://www.sevenforums.com/software/...e-macrium.html
You'll have to reactivate at Computer>Properties using new Product Key, or access an elevated Command Line
to run slmgr -ipk
followed by a space and the New Product Key.
Otherwise copy over your files using drag n drop from external, flash stick or CD/DVD, and reinstall your programs. Tips for cleaning up factory pre-install bloatware: HP laptop has used up all four primary partitions