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#21
When you boot to Safe mode you should have an option to use Safe Mode with networking, select this and you will have internet access.
My 4 year old Dell desktop has this function, yours should also.
Your computer is getting older, you need to check the temperatures, CPU, graphics card, motherboard, this will confirm the system's health.
Then test the hard drives, RAM, CPU, and Disk Check, only if the temperatures are in a safe range.
Just follow the good advice you have been getting.