情报标题：
Windows 10 May 2019 update is blocked on PCs with USB drives and SD cards
Windows 10 1903更新会因为电脑有装USB储存设备而被阻挡，包括记忆卡
情报来源：
Windows Central
情报网址：
https://www.windowscentral.com/windows-10-may-2019-update-
blocked-pcs-usb-drives-and-sd-cards?utm_source=wc_tw&utm_m
edium=tw_card&utm_content=64325&utm_campaign=social
https://is.gd/Ujr81T
情报完整内文：
You can get your hands on Windows 10's big May update before everyone else,
but you should remove your external storage devices before you proceed.
Windows 10 May update has a weird bug where it was found to be reassigning
drive letters for external storage devices. For instance, if you have a USB
hard drive that shows up as the D: drive, the update could shuffle it to the
E: drive. As a result, Microsoft is blocking the update from installing on
PCs that have USB storage or SD cards attached to them:
Inappropriate drive reassignment can occur on Windows 10-based computers
that have an external USB device or SD memory card attached during the
installation of the May 2019 update. For this reason, these computers are
currently blocked from receiving the May 2019 Update. This generates the
error message that is mentioned in the "Symptoms" section if the upgrade is
tried again on an affected computer.
If you have a USB drive plugged into your PC and try to install the May
update, you'll get a message that says, "This PC can't be upgraded to
Windows 10." Thankfully, there's a pretty straightforward fix: just remove
whatever external storage device that's attached to your PC, and you'll be
able to install the update just fine. From Microsoft:
A USB device or SD card that's inserted into the computer can cause this
issue to occur. To work around this issue, remove the external media and
restart the May 2019 Update installation.
As noted by Ars Technica, this isn't the first time a Windows update messed
with drive letter assignment. Build 1803 would randomly assign letters to
recovery partitions, and then deliver incessant notifications about disc
space running out. It's a much more manageable issue, but it's still weird
that Microsoft wasn't able to catch this during early beta tests.
只挑几个重点不负责任翻译：
1.Win10 1903更新程式在侦测到电脑上有外接储存设备时，会出现“本电脑无法安装”
的错误讯息。
2.这个错误的原因是安装程式在启动过程中会乱动你的外接磁盘的代号，以至于被系统
当作是类似恶意程式的行为而将其挡下。
3.解决方式很简单，移除所有外接磁盘，重开机就好。
4.这个问题在刚好一年前的1803也发生过。
心得：
如果这个问题在1803也发生过
那我是不是也需要担心今年底的1910也会出现用户资料夹又被清空的灾情....