Make a Win7/Win8.1 installation U disk, how to retain the original data?

How to install Win8.1 system on U disk? For ordinary users, this is not difficult. For example, the soft media U disk boot master can easily help you identify the MSDN original system and burn U disk, but the fly in the ointment is that every time It is a full-format format and cannot retain the original data of the USB flash drive.
For 8G, 16G or 32G large capacity U disk users, can you make Windows 8.1 U disk without the disk? The answer is certainly yes. The IT home is also a U disk "big users" carefully organized a graphic tutorial, can also make Win8.1 installation U disk.
This time, we invited Microsoft's own U disk boot production tool (Windows 7 USB DVD Download tool) to support the production of Windows 7 and above. Although Microsoft's own tools automatically erase all data of the U disk by default, the disk burning system, but we can enable a hidden registry, open the Windows 7 USB DVD Download tool to automatically retain the original data of the U disk.



not long story, the specific steps are as follows ——
1, download and install Windows 7 USB DVD Download tool;
2, open Notepad, create a blank document, enter the following Content:
Windows Registry Editor Version 5.00
//Disable Windows 7 USB DVD Download tool U disk formatting function
[HKEY_CURRENT_USERSoftwareMicrosoftISO Backup Tool]
"Version"="1.0.30"< Br>"Shortcut"="1"
"DisableFormat"=dword:00000001

IT Home Reminder: If you need to keep U disk data, just change the last bit to 1; When burning a disc, just change the mantissa to 0.
3, the above blank document, save as "disable Windows 7 USB DVD Download tool U disk format.reg"; registry file, pay attention to the document txt suffix name changed to reg format;
4, run Import the registry file;

5, now we can retain the original data, make Win8.1 installation U disk, refer to the following graphic usage process.
▼16G test U disk, has stored 32MB data

▼Run Windows 7 USB DVD Download tool, select Browse, browse Win8.1 with Update complete ISO system image

▼Select USB mode, start writing

▼ tool default prompt data risk (in fact, the U disk data is turned on), select Erase USB device

▼ Normally write Win8.1 ISO image to U disk

▼ Successfully created Win8.1 installation U disk, while retaining the original U disk data