system problem during startup

Hello, just last night I had taken my CPU fan off to apply some more thermal paste and after I had secured it back on and plugged the fan on I’ve been getting those error lights from the motherboard I’ve reseated the RAM, checked the CPU (nothing bent or dirty), and nothings wrong with the fan...

Hey everyone, I have a problem with my system. My system is Windows 10 (latest update). I have an SSD and HDD disks - the system is on a 480 GB SSD, the disk is functional and half empty. I have 16 GB of RAM and a GTX 1060. I have a problem when I start my computer (both restart/shutdown -...