Vista会对硬盘可用空间进行监控，当磁盘空间不够时，Vista会在任务栏上显示警告信息.禁用此功能，其实只需：
*WIN+R运行“Regedit”打开注册表编辑器
*找到[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
*新建一个Dword值并命名为"NoLowDiskSpaceChecks"（不含引号）
*双击新建的键值并将其设置为1
*注销或重启后生效
附部分原文：
Windows Vista monitors the amount of available disk space and displays a warning in the taskbar when the hard disk is almost full. To disable this feature, perform the following steps:
1- Open the registry editor (Start/ type: regedit and hit Enter)
2- Navigate to [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
3- Create a new DWORD value and name it "NoLowDiskSpaceChecks" (without quotes)
4- Double-click the new value, set it to 1, and click OK.
5- Close the registry editor.
6- Log off and log back on for changes to take effect.
责任编辑：小草
