Hi tens. My name is Ivan, and I am an Independent Assessor. I'd be more than happy to assist you. I'm so sorry that you are experiencing this issue. Don't worry, I'll do everything I can to help you.
The new RAM is likely causing the problem. While there may be other underlying issues, the timing of the problems strongly suggests a RAM-related problem.
Isolate the problem:
Remove the new RAM: Take out the new RAM and try to boot your laptop with just the old RAM. If the problems go away, the new RAM is confirmed to be the culprit.
Reseat the RAM:
Even if the RAM appears securely installed, try reseating it. Sometimes a loose connection can cause problems.
Update the BIOS:
Check for a BIOS update on your laptop manufacturer's website. An outdated BIOS may not be compatible with the new RAM.
I'll be happy to hear from you if you have any additional questions.