For reasons of operational safety, all IT technical systems of the HRZ are subject to maintenance. A distinction must be made between regular maintenance and security-critical updates:

• Regular maintenance: These are updates to be installed on a regular basis that fix bugs and possibly extend the range of functions.
• Security-critical updates: These are updates that must be installed immediately, as without them the security of the IT technical system cannot be guaranteed.

Security-critical updates must therefore always be installed immediately. Since not all systems are available in a clustered, fail-safe form, this necessarily leads to interruptions in operation, even during the semester, which unfortunately cannot be avoided.

Regular maintenance is installed at fixed times. Here, too, not all systems are available in a clustered, fail-safe form, and this also leads to interruptions in operation.

• Regular maintenance is carried out during the lecture-free period if possible, i.e. preferably in the months of February and August.
• Work is announced 7-14 days in advance by e-mail to the affected groups of people.
• The work usually takes place on weekdays between 08-18 hrs.
• At the beginning of the announced date, the maintenance work is displayed in InfoSys.

Note: Currently, only the BIOS/UEFI, firmware or other Dell Security Advisory updates are to be carried out via Dell Command | Update. The following configuration instructions have been adapted accordingly. Changes are possible at any time.

Source for application download: https://www.dell.com/support/home/de-de/drivers/DriversDetails?driverId=MJ3C3

Directory and problem description of affected devices regarding Dell BIOS/UEFI vulnerability DSA-2021-106: https://www.dell.com/support/kbdoc/de-de/000188682/dsa-2021-106-dell-client-plattform-sicherheit-update-f-uuml-r-mehrere-schwachstellen-in-der-supportassist-biosconnect-funktion-und-https-boot-funktion

Note: If the Dell Support Assist software is installed, it should be uninstalled before installing Dell Command | Update. To do this, open the “Control Panel” (enter in the Windows search mask) and then “Programs and Features” (if necessary also “Uninstall Programs”). 1. Please execute the file with a double click. In the further installation process, select: “No, I don't want to participate in the program.” 2. Please confirm the installation process. Then complete the process by clicking on “Finish”. ====Configuration of Dell Command | Update==== 1. open Dell Command Update. You can find the application by typing its name in the Windows 10 search bar. 2. 2. please select: “Yes, run automatically with the default settings (recommended).” 3. now click on the cogwheel at the top right to enter the settings. 4. under “General” –> “User Consent”, check that the box is unchecked. 5. Please configure the settings under “Update Filter” as shown below. Please configure the settings under “Update Type” as shown below. 7. if your BIOS is password protected, you must store the password under “System Password”. Note for Bitlocker-encrypted devices: Further down you will be informed with a yellow highlighted warning that Bitlocker will be automatically interrupted during a BIOS or firmware update. This should only happen if your device is not infected by malware. 8. now the configuration is complete. All other parameters do not need to be adjusted. Use of Dell Command | Update Prerequisite for an update:**

• For mobile terminals, a power supply unit is absolutely necessary (secure power supply).
• Current backup of user data or system.
• For Bitlocker encrypted devices: Recovery key from Bitlocker should be available.

Performing a system update

1. start the update scan by clicking on “Check”.

2. follow the instructions