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Chris HoffmanEditor-in-Chief

Chris Hoffman is Editor-in-Chief of How-To Geek. He"s written about technology for over a decade and was a PCWorld columnist for two years. Chris has written for The thành phố new york Times, been interviewed as a technology expert on TV stations lượt thích Miami"s NBC 6, & had his work covered by news outlets like the BBC. Since 2011, Chris has written over 2,000 articles that have been read nearly one billion times---and that"s just here at How-To Geek. Read more...

Bạn đang xem: File $windows. bt là gì

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UpdatedJul 10, 2017, 2:37 pm EST| 2 min read
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The $WINDOWS.~BT & $WINDOWS.~WS folders are associated with the Windows 10 upgrade process. They may appear on either Windows 7, 8, or 10, using gigabytes of disk space.

These are hidden files, so you’ll have to lớn show hidden files in Windows Explorer or file Explorer to see them.


On Windows 7 and 8

RELATED: How khổng lồ Show Hidden Files and Folders in Windows 7, 8, or 10

During the miễn phí Windows 10 tăng cấp period, Windows 7 & 8 automatically downloaded Windows 10 installation files và stored them in the $WINDOWS.~BT folder. When you agreed khổng lồ the không tính tiền upgrade, it could start quickly using the already downloaded installation files.

The không lấy phí upgrade period is now over, so you couldn’t use these files lớn upgrade to Windows 10 even if you wanted to.

Microsoft should eventually remove these files if they’re still present on any Windows 7 or 8 systems, but they may still be sticking around for now.

On Windows 10

RELATED: What is the Windows.old folder and How vị You Delete It?

On Windows 10, the $WINDOWS.~BT folder contains your previous Windows installation. These files are used to lớn downgrade to a previous version of Windows, or a previous build of Windows 10.


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It’s similar to the Windows.old folder, which contains files from your previous Windows installation. In fact, you’ll see both folders after upgrading to lớn Windows 10–both Windows.old & $WINDOWS.~BT folders.

It also contains log files. For example, if you download and run the truyền thông creation tool, it creates a $WINDOWS.~BT folder with a few setup log files. That truyền thông media creation tool also creates a $WINDOWS.~WS folder that contains most of the Windows thiết lập files.

Windows should automatically delete these files to miễn phí up space after ten days in the Anniversary Update, or thirty days if your PC hasn’t upgraded to lớn the Anniversary Update yet.

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Can You Delete It, và How?

RELATED: Is It Safe to Delete Everything in Windows" Disk Cleanup?

Warning: If you choose to delete the $WINDOWS.~BT thư mục on Windows 10, you won’t be able to lớn downgrade lớn the previous build of Windows 10 or previous version of Windows your PC had installed. The option to lớn roll your PC back at Settings > Update & Security > Recovery will vanish. However, Windows 10 automatically deletes these files after ten days anyway.

If you want to lớn delete these files, though, you can. But you shouldn’t just delete them the normal way. Instead, you should use the Disk Cleanup tool included with whatever version of Windows you’re using.


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To vị so, access the Disk Cleanup tool & click “Clean Up System Files”. Check the following items in the list and remove them:

Previous Windows installation(s): This deletes the $WINDOWS.~BT & Windows.old folders on Windows 10.Temporary Windows installation files: This deletes the $WINDOWS.~BT thư mục on Windows 7 và 8, and the $WINDOWS.~WS thư mục on Windows 10.

Click “OK” khổng lồ remove the files.

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If the $WINDOWS.~BT folder is still present afterwards, it likely just contains a few spare log files–or now-useless thiết lập files on Windows 7 or 8–and you can try deleting it manually from tệp tin Explorer. Just right-click it and select “Delete”.


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Chris HoffmanChris Hoffman is Editor-in-Chief of How-To Geek. He"s written about giải pháp công nghệ for over a decade and was a PCWorld columnist for two years. Chris has written for The new york Times, been interviewed as a công nghệ expert on TV stations lượt thích Miami"s NBC 6, and had his work covered by news outlets like the BBC. Since 2011, Chris has written over 2,000 articles that have been read nearly one billion times---and that"s just here at How-To Geek. Read Full Bio »