Thanks Steve,
excellent idea -- worked!

The Edge startup page ("top sites and suggested content") only shows a blank screen - see below
Startup page worked immediately after Win10 update.

On 8/1/15 MS tech ran CCCleaner in failed...

received same errors on every restart -- but does not occur after shutdown/power up



chat with Microsoft tech did not solve problem, but while trying to fix it, technician cleared me caches...