我昨天用Windows Update下载service pack2了, 并升级了瑞星,之后本来都好好的.今天开机后桌面就变成了黑色背景,还有"Warning! Your computer might be infected with spyware or adware......" 桌面一会变回原来正常的样子,一会又变黑,不停的变.闪的我眼都花了.
桌面右下角还出现了一个小红球,不是跳出"Your computer is infected, click here..."

怎么办 啊? 哪位高人能帮帮我? 谢谢了!