Replace old hard drive with new.
Can geek squad install and transfer old files. program files & OS to new hard drive? And at what cost?
Yes they can. Being prior Geek Squad they can transfer all of that as long as the old hard drive is still in working order. The costs have changed since I worked there and I'm pretty sure you have to make an appointment now to take it into the store or a in home service so calling your local Best Buy and asking the cost would get you the accurate price and get you setup for an appointment if you choose to have them do the services. Note that the Operating Install would also require the disks that either came with the machine originally or that you should have created when you first got the machine. If you do not have them then you may have to contact the Manufacture and get them ordered to your specific model.