The seahorse play simulator failed to start, start machine failed! error code = 3 and error code = 21

Ssdwin7 installed Visual Studio 2019, opened the web page, finally crashed at the last minute…
Then ghost reinstall, a few times plug and unplug and then SSD disappeared…
Repurchase SSDS and reinstall them.
… It’s all foreplay…
Today, I opened the seahorse inside the Ghost to play the simulator, and the result was wrong:
start machine failed! Error code = 3.
Search all kinds of methods, find the official forum, it is no good.
Turn on the BIOS and turn on Virtual Technology. I can’t.
On the official website of Haima Apple community, search start Machine Failed! Error code = 3, searchid=10& orderby=lastpost& ascdesc=desc& searchsubmit=yes& kw=start+machine+failed%21+error+code+%3D+21
It doesn’t work any way.
Delete c disk program files under Oracle is also not good.
Control panel unloading virtual Box does not work either.
The repair tool won’t work.
After reloading the official full version of the Virtual Box, and then reloading the Haima, the error code changed to 21. tid=43521& highlight=start%2Bmachine%2Bfailed%21%2Berror%2Bcode%2B%3D%2B21
start machine failed! For users with errpr cpde = 21 problem resolution
Win+7 or above, press Win+R to open the run dialog and then run the following command to fix it.
%SystemRoot%\ InfDefaultInstall. Exe “%programfiles%\Oracle\VirtualBox\drivers\vboxdrv\ vboxdrv. inf”
XP user or not doing the above, please open this path: % programFiles %\Oracle\VirtualBox\ Drivers \vboxdrv\, then right-click “Vboxdrv. inf” and select “Install” from the right-click menu.
With respect to OK

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