I succeeded in destroying my Dell laptop ... left on the gate of my pickup...don't even ask

I am looking at maybe building a system as laptops and Tom don't work well together.
Question is - if I build a system will I be able to use my recovery disks with the OS on them and transfer to the new system?
The system was Windows 7 - 64 bit.
If not it may squelch that idea from cost basis as Windows 7 is just more $$$
Thanks for any info