Had Windows 7 ultimate just upgraded to Windows 10. Install seemed to go ok. However after 15ish minutes the monitor power down saying no signal. Computer stays running. Only way to get it back on is to turn the tower off and on again, then 15 mins later same again. Spoke to Microsoft lad tied to sort it but after nearly 2 hours said go back to Windows 7, leave it a week and try installing again. Anyone else herd about this or had this happend to them?