In the opinion (
translated), the BSI "warns neither the public nor the [German] government prior to any deployment of Windows 8."
"The BSI is currently facing, however, some critical aspects related to specific scenarios in which Windows 8 is operated in combination with a hardware that has a TPM 2.0," it added.
The German federal agency notes that certain groups of users can use Windows 8 and a TPM chip that offer an "increase in safety."
It does, however, also reiterate that the use of Windows 8 in combination with a TPM 2.0 is accompanied by "accompanied by a loss of control over the operating system and the hardware used." It explains that for federal users and computers running critical infrastructure such as water, electricity, and gas networks may face "new risks." These computers should be one of, if not the most secure devices running in a country, as they control infrastructure critical to life and well being.
"Generally it should be possible [for] IT users to maintain a self-determined and autonomous dealing with information technology," the opinion read, which any IT professional will know is good, solid advice on the part of any reliable information security person or agency.
The opinion also explains that should Windows 8 or the TPM chip malfunction or become damaged in some way, it can lead to the conditions that "prevent further operation of the system."
The BSI is, essentially, talking about "bricking" computers. And it's right to. If there is a malfunction, it could lead to Windows 8 stopping working, and a situation where data may be lost. Worse, it could lead to the computer or hardware being "permanently withdrawn from use."
The opinion does state (translated): "In addition, the newly established mechanisms can also be used for sabotage by third parties."