I am trying to upgrade a computer that has a ton of information and programs on it. I bought and installed a new motherboard and processor, new ram, and new power supply. When I turn the computer on, it goes to the "Biostar" (motherboard) screen, then to the windows welcome screen, but the progress bar only goes across 1 /12 times-it stops halfway on the second pass every time, and then restarts and goes back to the Biostar welcome screen and then the whole screen message about "Windows did not start successfully" and it gives the option to start in safe mode and all that. If I try and start in safe mode, it displays the screen with all the info like it's going to start up, but then it just restarts the whole thing over again.
I took it to a computer repair shop and they charged me $50 and told me that when you change the motherboard and processor that you have to reinstall Windows and all of your programs and then reinstall everything on your hard drive. I have never heard this before. I have upgraded computers before and as long as I did not put in a new hard drive I did not have to install windows again. In fact I completely built a computer from the ground up and just used an old hard drive with Windows installed and all I had to do was register the licence and everything was intact.
What should I do? Is there a way to get this working and not lose anything on the hard drive?