[Windows 10] 發現了新問題:store and ms account sign-in

(1)
store 突然只可以更新 apps,不能安裝新 apps,彈了句...
"Try again later.  We have problems at our end."
store 真是問題多多,好心整簡單些啦,咁樣點普及 windows 10 apps ???

at our end ... 微軟攬上身,但對件事冇幫助,怎解決?

(2)
唔知幾時開始在 settings/account click "sign in with MS account" 冇反應?
有冇人有這問題?