drive D: is currently in use by another process

这是什么意思？
我想把D盘格式化就出现这个提示。
我的系统98

drive D: is currently in use by another process It is freezing outside;you'd better ___black ice when you drive home please insert disc4 to drive d: Ceneral faiure reading drive D Abort,Retry,Fail? 安装完游戏出现~The wrong volume is in the drive.Please insert volume YS6 into drive E: 错误窗口~ score is %3d,grade is %c cur是 什么意思 ？ .cur用什么打开? Arguments for or against the view that globalization is an effective way to drive off poverty 作文：the view that globalization is an effective way to drive off poverty