Before you do any file transfer, you should Defrag the old computer.
Most of your problems are probably being caused by fragmentation, and if you do not defrag, you will be transferring problems to the new machine.
You may find out that you didn’t need a new machine.
Defraging should be done at night while you are sleeping.
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You need to read the post from a few days ago. The old laptop had a defective keyboard and battery.