has't installed windows driver

has't installed windows driver是什么意思？
这个提示在电脑快进入windows启动图标时出现的,按任意建后仍可以正常进入系统.

has't installed windows driver The employee has tried every way____he has found but still can't solve the problem 改错our teacher doesn't has supper school What has a tougue but can't speak? He ( ) got the party ready yet. a.haven't b.hasn't c.has already been d.has 在I don't think Kate has a healthy lifestyle.中为什么不用have而用has啊 Neither you nor he has gone/has been/hasn't gone/hasn't been to Beijing.选哪个? Has( )lost this watch?-Yes,but we can't find out who. He has visited a great number of different places.He hasn't stayed in___place. What has a tongue,but can't speak? What kind of flowers have mouths?