Cannot install new software

Hi, lately I'm having some problems with my laptop.
About a week ago I had an issue where I couldn't log into my Microsoft account after installing some updates, it kept saying "Preparing Windows" and then logging me into a temporary account, but I fixed that by restarting. Then immediately after I couldn't open programs, because apparently I didn't have permissions over the Program Files folder (even though I'm an administrator), but I fixed that by going through all the program folders one by one (see attached pic).
I'm mentioning this because it's probably related, because now I also cannot install any new programs, I keep getting various errors. I tried installing the new Microsoft Edge, iTunes and Malwarebytes but they all gave me an error. I tried installing apps from the Microsoft Store, but that gave me error 0x80010108. I also tried to install some updates, and that gave me an error as well, 0x800700b7.
The only thing I remember doing before this was installing some drivers, which Dell recommended based on my system, so they were compatible with my laptop.
Even before this, I had a memory management error which made me do a clean installation of Windows 10, but everything was fine after that so it's most likely irrelevant to my current issue.
I'm running Window 10 Home 64-bit, version 1909.
What could be the issue here and what could I do to fix it?

The laptop is only 2 years old.

I haven't noticed anything else, not that I remember. I got that memory error the last time while using Photoshop, and it had happened once before as well.

I was hoping there would be something else I could do other than a clean install, I don't have enough space in my external hard drives to move all my files, and it's a pretty tedious task anyway.

If you have messed with ownership of program files that could do it in most cases trusted installer must own the folders

sygnus21 said:

Seeing the PC is only two years old; hardware may not be an issue; but....

Anyway; lets say hardware is good for now. So, you could try a repair install Repair Install Windows 10 with an In-place Upgrade where you wouldn't have to reinstall all your setting are programs - but given all the issues, that might be your only way.

Some other alternatives....

• Use DISM to Repair Windows 10 Image
• Run SFC Command in Windows 10

I will try these, thank you.

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Samuria said:

If you have messed with ownership of program files that could do it in most cases trusted installer must own the folders

I checked and TrustedInstaller has Full Control of the Program Files folder.