I opened this thread for those who are having initial or on-going issues with Windows 10. While all the 'good news posts' are encouraging in other threads, those who are struggling or frustrated need a separate thread to discuss their situation because these posts are being lost in the flurry of excitement. Unfortunately, my W10 upgrade failed on error code C1900208.after the download reached 100% complete . I googled the error and a lot of people have this same error. It appears it was a WSUS issue, however MS has no solution for this failure and says it continues to happen and this error code is also appearing on the install. They are looking into it and their response is, WAIT. I received my upgrade on July 29 and MS sent me an email notification July 31 informing that my upgrade would soon be sent to me. I assume this means that WSUS does not know this WU failed.