Conservative? Republican? Fuck yourselves. You’ll pay for your stupidity.
Assuming you have access to a secondary computer to make a LiveUSB
boot a live disk/USB on your PC and copy the data you want off. Then reinstall the OS.
If you haven’t got a drive you can move data to, from the live OS, partition your disk and move the data to the new partition CAUTION ON PARTITIONING
iirc Secure Boot requires the kernel to be signed with some payment given to (I think) Microsoft to do it. I believe Canonical / Ubuntu are one of the few to do this.
So no, Manjaro as far I am currently aware, doesn’t support secure boot (or secure boot doesn’t support Manjaro)
See this comment https://sh.itjust.works/comment/1796724
I don’t believe you even know what a “shill” is