can i transfer my operating system to another hdd with out reinstalling it? i have to replace mine
hp case custom
gigabyte mobo 2 dvd drives
2 gig memory
3.33 intel cpu
If you have a restore disk, and all you change is the hard disk, yes, I have done that several times. You will lose all your data though, so be careful. It is possible to clone the contents of the hard drive to another one, but I would defer to others about how to do this.
If you are building a new computer and/or replacing the motherboard, you will need to get a new windows license.
What OS are you trying to re-use? From the specs, it looks like your computer could be fairly old. If it is xp, I would just update to Win 7 anyway, as xp will no longer be supported in 2014.