This is a RANT, so please don't read below this line if you don't want to hear about issues with the SP4. With over 20+ years in the IT field, I have NEVER experienced as many problems as I have with the combination of the SP4 and Windows 10 ! With many of us spending $1700+ for the new SP4, it is ridiculous that we have to troubleshoot and put up with VERY frequent Blue screens, all browsers completely locking the SP4 and overall buggy operation. With so many people having so many problems, it seems as if the Combo (SP4+Win 10) was not tested in even the basic sense. The media deserves to jump all over this as another Vista fail. I've had to look up so many different errors shown on the Blue screens that I just want to take this product back. It's embarrassing to try to do work with coworkers or friends and have to tell them to hold on because your system COMPLETELY locked up or a blue screen is rebooting your system. with system restores, formatting, running updates, reading this forum and others, I'm at my wits end and plain tired trying to use this device for it's intended purpose. Microsoft, this is YOUR forum ,read some of these comments and put a dedicated team on the problem ASAP. Your loyal customers are getting hammered trying to justify this travesty.