Hey there, thanks for your inquiry. The system should ship with DDR5-5600, and the max memory used in testing was DDR5-5600. With XMP enabled in the system BIOS, you should be able to take advance of the current memory speeds.

Hey Becca, we're sorry to hear that you ran into this issue with your Yoga 7. To try to resolve this, we recommend visiting our PC Support website at this link: (https://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/yoga-series/yoga-7-2-in-1-16ahp9/83dm/83dm0003us/downloads/ds567283-wlan-driver-realtek-mediatek-for-windows-11-64-bit-yoga-7-2-in-1-14ahp9-yoga-7-2-in-1-16ahp9?category=Networking%3A%20Wireless%20LAN), to download the drivers for your model Yoga onto an external drive and transfer them to the computer, or setup the computer bypassing internet and having windows search for the drivers for you. For the later process, here is a link to a Microsoft Support webpage that details how to do so: (https://support.microsoft.com/en-us/windows/update-drivers-manually-in-windows-ec62f46c-ff14-c91d-eead-d7126dc1f7b6.)

Hey Annie, Microsoft Office is built-in to the Windows 11 operating system with the apps preinstalled; however, without purchasing a long-term Office solution, such as Microsoft 365, only a 30-day trial can be activated out of the box. Here is a link to the Microsoft Office landing page on bestbuy.com to learn more about your Office options: https://www.bestbuy.com/site/microsoft/microsoft-office/pcmcat748300511466.c?id=pcmcat748300511466

Hey Zack, you should be able to add a DVD writer as the part (Part No 5DX1C19009) is currently available for order for the ThinkCentre M75s (https://pcsupport.lenovo.com/us/en/products/desktops-and-all-in-ones/thinkcentre-m-series-desktops/thinkcentre-m75s-gen-5/12ta/parts/display/compatible)