A coworker has an HP ultrabook and it will boot up and load windows at various speeds depending on if he is at home or in the office. I checked for bloatware, virus, and malware but the system is clean. when we boot it here in the office it only takes 1-2 minutes max to get logged into windows but when he takes it home it takes 10-15 mins to log in to windows. any ideas on causes of this slowdown? I asked about possible thermal throttling but he uses a cooing pad at home and it runs fine at the office even with stress testing.