紧急求救-laptop 升级到Windows8.1后,启动不了,一直处于循环状态。到4个框就启不来了,"error PC will collect errors we will restart it again..." SAMSUNG series 5 ULTRA 试了F8,shift+F8, Ctrl+F8, F4 都不工作。机器过了保修期,没有backup,所有东西都在他里面。急啊。。。 SAMSUNG support team can not help. 请大家帮忙,谢谢了