HDD to SSD and Windows 8.1 HD
My Acer laptop is about 2 years old and was running slow with quite a bit of crap on it....I just upgraded to a larger SSD on my desktop and I put my old SSD into my laptop and installed Windows 8.1. Now its very fast and starts up in under 20 seconds, my old HDD was a WD Scorpio Blue 640gb.