It has become obvious that my current laptop has slowed down considerably. I would appreciate suggestions for upgrading. Current laptop is a 2014 or so Lenovo Thinkpad:
Processor: Intel Core i5-3230M CPU @ 2.60GHz
RAM: 4GB
System: Windows 7 Professional 64-Bit
Hard Drive: 450GB, of which 319GB is free at the moment.
Some options for a replacement at my local computer store are https://intrex.com/PCs/Notebooks.aspx. Will any of these improve speed noticeably? When I launch Windows task Manager, I observe that the CPU usage bar is small but the memory bar is close to the max most of the time - sometimes at 100%. Or do I look at something like Dell, where options are considerably larger? What would be the minimum spec, what would be desirable and what would be overkill? From prior discussions, I believe Windows 10 Professional is the standard, but what about the rest of the specs?
EDIT: I should mention I am looking at laptops so that I can move easily between offices. I am not at a place financially where I can maintain a desktop and a mirrored laptop.