Is there an office of the "Better Business Bureau" in your area?
Is that seller a member of B.B.B. ? If so, they can talk to the seller.
Does your local TV station have an "investigative" reporter, who produces news-hour videos about consumers who have been "ripped-off" by a local business? Often, if the reporter talks to the seller, while researching the story, the seller might suddenly be more accommodating -- not wanting their business to be "featured" on TV.
Can you get to the "System Recovery" screen, and "reset" your PC (restore it back to the "factory" settings, by reinstalling Windows 10) ?
Note that a dual-core 1.35 Ghz CPU is not the world's fastest processor.
Similar (but more expensive) CPUs can run at 2.7Ghz, i.e., twice as fast, or faster.
Some CPUs are quad-core -- 4 CPUs, which obviously will be less "sluggish".
This topic has been archived. Information and links in this thread may no longer be available or relevant. If you have a question create a new topic by clicking here and select the appropriate board.