And every year the same section is missing from the c’t manual:
It may be that you want to use last year’s stick again. If you plug it in, it appears in Explorer / File Manager No On. If you start the installation program “Desinfect2USB_64Bit.exe”, the window containing the text “remove all USB data carriers except de.”[m] USB stick … “. There you would expect” OK “, but it does not exist, so you click” Accept “. Then a new window appears with a security question where you would logically” Yes “. And that’s it. This is again a new window” Win32 Disk Imager “. There you will find under the image file, for example,” H: /software/desinfect-202100-amd64.iso “, ie mounted ISO image. Under “Device”, however, select No USB-Stick as it has not found the Windows drive letter. So close / quit all programs with “Exit”, “No”, “Quit”. Then Start CMD as an administrator (press the Windows key, type CMD and select “Run as administrator” on the right) and confirm with “Yes”) then type in the black window:
Diskpart (hereafter enter key)
Wait until “diskpart>” appears.
Type in list disk (following …)
There is a small table. It shows all available data carriers. The second column (###) shows a number, the size column shows the size of the data carrier. Depending on the size, see the line with the USB stick, so that the size is slightly smaller than the USB stick. It may look like this, e.g.

Disc 2 Online 14GB 9GB

Now you select the data carrier; With in this case
Select disk 2
Which leads to the message “Disk 2 is now the selected disk”. Together
List disk
There is now a “*” (asterisk) in front of Data Carrier 2. Everything you do now does with this data carrier, so be sure to check it, otherwise you have irrevocably deleted the data on another “hard drive”. Now with command
clean
Delete partition data. A success message appears
Together
Go out
Go out
First exit Diskpart and then close the CMD window.

When you take a deep breath you can hear “PALIM PALIM” several times from Windows and in Explorer you can now see that the USB stick has a drive letter.

Now start “Desinfect2USB_64Bit.exe” in the image again and in the imager you can see not only the image, but also the drive letter in the “drive” window at the end. If everything is correct, click “Write” and wait a moment. After the success message, you will be asked whether to restart. You have to do it sooner or later. I recommend that select “No”, close all Windows programs and press the Windows key described on page 20 and from now on, select the Shift key (no matter what), IO and then “Restart” and the first. shift key. When the selection page “Select Options” appears. Then choose “Use Device”. Then a new page appears on which you can find “EFI Transcend USB Device” or something similar to the name of the manufacturer of the USB stick. If necessary, “EFI USB devices” can also work; This is probably a bit BIOS dependent.
If you have selected it now, the computer should boot from the USB stick and a black window with white text should appear. The first inverse line is not a heading, but a selection to convert the USB stick, which you must do by pressing the Enter key.
The USB stick turns on again and after several awkward lines of text, the orange desktop appears with Desinfect 2021. Unfortunately in a folder symbol on the desktop (I do not have another PC) there is a program la “Update Virus Signature”, which you can double click hopefully can start. You can see the progress of the update (about 10 minutes) in a window and in the top right corner of the desktop. Finally, you can exit Linux with a click on the red button at the bottom left of the desktop and remove the stick by closing the PC and store it so that it can be found …
After switching to PC, it will re-boot normally from Windows.