如果您最近发现了$Windows.~BT文件夹，您可能需要删除它以释放硬盘驱动器上的一些空间。幸运的是，删除它是安全的，但它并不像您想象的那么简单。
本文介绍了$Windows.~BT文件夹是什么，是否可以安全删除，以及如果您选择如何删除。
$Windows.~BT 文件夹是什么？
$ Windows.~BTMicrosoft Windows操作系统的驱动器上的隐藏文件夹。从旧版本升级到Windows 10 或将 Windows 10 更新到(Windows)新
版本时， Windows会在 $ (Windows)Windows.~WS和Windows.old文件夹旁边创建此文件夹。
$ Windows.~BT文件夹包含所有以前的Windows安装文件和重要的日志文件，以防安装不成功并需要故障排除或恢复。过去，删除 $ Windows.~BTControl Panel > System和Security > Backup和还原(Restore)( Windows 7 ) 找到的(Windows 7)系统恢复(System Recovery)工具恢复到旧版本。
但是，不再可能降级到Windows 7或 8。相反，它们需要全新安装。更糟糕的是，$ Windows.~BT文件夹会占用你的硬盘上几十 GB 的空间。那么，可以删除吗？
你能删除 $ Windows.~BT Folder吗？
简而言之，是的。删除 $Windows.~BT 文件夹既安全又容易。这样做不会删除您操作系统的
重要Windows文件。(Windows)
无法再使用 $ Windows.~BT文件夹降级回以前的 Windows 版本(version of Windows)，因此您最好将其删除以节省(save disk space)HDD 上的磁盘空间。
注意：Windows 应在更新到Windows 10(Windows 10)或新版本
十天后自动删除 $ Windows.~BT
如何找到 $ Windows.~BT Folder
首先，检查系统上是否存在 $ Windows.~BT文件夹。为此，您需要能够查看隐藏文件。要启用此设置：
- 打开文件资源管理器。
- 选择查看选项卡。
- 选择选项。
- 选择查看选项卡。
- 向下滚动(Scroll)并选中显示(Show)隐藏的文件、文件夹和驱动器。进一步向下滚动(Scroll)并取消选中隐藏(Hide)受保护的操作系统文件（推荐）复选框。选择是接受警告消息。
启用此设置后，导航到 $ Windows.~BT文件夹所在的驱动器（例如，C: 驱动器）。
如何删除 $ Windows.~BT Folder
如果该文件夹存在，则无法通过简单地按删除键将其删除。相反，您必须使用磁盘清理工具(Disk Cleanup Tool)。为此：
- 打开“开始(Start)”菜单，键入Disk Cleanup，然后选择应用程序。您还可以通过打开Run，键入 %windir% \system32\cleanmgr.exe并按Enter来打开(Enter)磁盘清理(Disk Cleanup)。
- 等待(Wait)实用程序打开，然后选择您的根驱动器并单击确定。
- 打开后，单击清理(Clean)系统文件。再次选择您的根驱动器，然后等待它扫描您的系统文件。
- 您现在应该在列表中看到几个选项。根据您的系统和Windows版本，可能会出现以下选项。其中任何一个都将删除 $ Windows.~BT文件夹。
- 以前的 Windows 安装
- Windows 更新清理
- Windows 升级日志文件
- 临时Windows安装文件
- 临时文件(Temporary files)
- 单击确定。
- 选择删除文件。
- 打开您的根驱动器并仔细检查是否有任何文件夹（包括 $ Windows.~BT和 $ Windows.~WS文件夹）。如果是这样，请右键单击文件夹并选择Delete。
注意：如果您没有删除文件夹的权限，您可以通过以管理员身份打开命令提示符(Command Prompt)并键入以下代码，然后按Enter来启用它。请记住(Remember)将 C: 替换为安装操作系统的任何驱动器。
拥有 /FC:$Windows.~BT* /R /A
icacls C:$Windows.~BT*.* /T /grant
管理员：F
rmdir /S /QC:$Windows.~BT
如果这不起作用，请以安全模式(Safe Mode)重新启动您的 PC，然后重试。
停止讨厌的硬盘通知(Pesky Hard Drive Notifications)
Windows、Mac和Linux都有相当多的旧版本遗留下来的好功能和令人沮丧的功能。幸运的是Windows，您通常可以删除它们。如果您厌倦了磁盘空间不足的警告，删除Windows.~BT和Windows.~WS文件夹可以释放一些空间并为您争取一些时间。
What Is the $Windows.~BT Folder (And Can You Delete It)?
If you’ve recently disсovered the $Windows.~BT folder, you may want to delete it to free up some space on your hard drive. Luckily, it’s safe to delete, but it isn’t as simple as you might think.
This article covers what the $Windows.~BT folder is, whether it’s safe to delete, and how to do so if you choose to.
What Is the $Windows.~BT Folder?
The $Windows.~BT folder is a hidden folder on the drive where your Microsoft Windows operating system is installed. Windows creates this folder alongside the $Windows.~WS and Windows.old folders when upgrading from an older version to Windows 10 or when you update Windows 10 to a new build.
The $Windows.~BT folder contains all of the previous Windows installation files and important log files in case the installation was not successful and needs troubleshooting or to be reverted. In the past, deleting the $Windows.~BT folder prevented users from reverting to an older build through the System Recovery tool found via the Control Panel > System and Security > Backup and Restore (Windows 7).
However, it’s no longer possible to downgrade to Windows 7 or 8. Instead, these require a clean install. Worse, the $Windows.~BT folder is that it can take up dozens of gigabytes on your hard disk. So, can you delete it?
Can You Delete the $Windows.~BT Folder?
In short, yes. It’s safe and easy to delete the $Windows.~BT folder. Doing so will not delete important Windows files for your operating system.
It’s no longer possible to downgrade back to a previous version of Windows using the $Windows.~BT folder, so you may as well delete it to save disk space on your HDD.
Note: Windows should automatically delete the $Windows.~BT folder ten days after updating to Windows 10 or a new build.
How to Find the $Windows.~BT Folder
First, check whether the $Windows.~BT folder exists on your system. To do so, you need to be able to see hidden files. To enable this setting:
- Open File Explorer.
- Select the View tab.
- Select Options.
- Select the View tab.
- Scroll down and check Show hidden files, folders, and drives. Scroll down further and uncheck the Hide protected operating system files (Recommended) checkbox. Select Yes to accept the warning message.
With this setting enabled, navigate to the drive where your $Windows.~BT folder should be (for example, the C:\ drive).
How to Delete the $Windows.~BT Folder
If the folder is present, you cannot delete it by simply pressing the delete key. Instead, you have to use the Disk Cleanup Tool. To do so:
- Open the Start menu, type Disk Cleanup, and select the app. You can also open Disk Cleanup by opening Run, typing %windir%\system32\cleanmgr.exe, and pressing Enter.
- Wait for the utility to open, and then select your root drive and click OK.
- Once it opens, click Clean up system files. Select your root drive again, then wait for it to scan your system files.
- You should now see several options in a list. The following options may appear depending on your system and Windows build. Any of these will delete the $Windows.~BT folder.
- Previous Windows Installations
- Windows Update Cleanup
- Windows upgrade log files
- Temporary Windows installation files
- Temporary files
- Click OK.
- Select Delete Files.
- Open your root drive and double-check whether any folders remain (including the $Windows.~BT and $Windows.~WS folders). If so, right-click the folders and select Delete.
Note: If you don’t have permission to delete the folders, you can enable it by opening Command Prompt as administrator and typing the following code, and pressing Enter. Remember to replace C:\ with whatever drive your operating system is installed on.
takeown /F C:\$Windows.~BT\* /R /A
icacls C:\$Windows.~BT\*.* /T /grant
administrators:F
rmdir /S /Q C:\$Windows.~BT\
If this doesn’t work, restart your PC in Safe Mode and try again.
Stop the Pesky Hard Drive Notifications
Windows, Mac, and Linux all have their fair share of good and frustrating features left over from older versions. Luckily with Windows, you can often remove them. If you’re sick of low disk space warnings, deleting the Windows.~BT and Windows.~WS folders can free up some space and buy you some time.
