2 week old laptop has full memory even though there's almost nothing on it

First make sure you can see hidden files... I am guessing you are using windows 10, use this tutorial on showing hidden files: https/www.technipages.com/show-hidden-files-windows

My next step would be get a USB, install an antivirus on it (ONLY IF YOU CAN'T INSTALL IT ON PC), and scan your C drive for junk, cache, and viruses I recommend CCleaner, Cleanmaster, or the obvious, malwarebytes...

Still no space? Next up you should (and this is one of the only times I recommend you do this, other times it's waste of power) go to your C drive or whatever is your main hard drive, fin the properties, go to tools, and defragment it.

If all else fails, try searching for large files in your computer directory, follow this tutorial: https/www.youtube.com/watch?v=dpqyb6XDWOQ


There's one final thing you can try, search for lubuntu online, make a bootable USB with it, boot your computer up and press F2 and F12, one of those keys brings up boot menu, boot from the USB (CHOOSE TRY IT WITHOUT INSTALLING!) and you'll see all files as it's a unix system running off your USB, don't worry, as long as try it and don't install it, you will still have windows when you restart... Now comes the hard bit, you need to go through all the files and see if any are taking up space.

In the end if all else fails, take it back to the shop and explain what's wrong..

IF YOU HAVE TROUBLE TRANSLATING THIS ASK FOR IT IN YOUR LANGUAGE AND I'LL DO MY BEST!