If you are concerned about introducing issues into your computer then my advice would be to avoid all free software and subscribe to Adobe’s Photography Plan to get Photoshop, and Lightroom which are the industry standards.
You are joking, I take it. I've already said enough about my level of expertise for you to know that I'm not a professional and have no need for "industry standards" software. To be more specific:
(a) I neither want nor need to use a cloud-based product
(b) Last time I used Photoshop Express it installed an image organiser program which I neither wanted nor needed, giving me no choice in the matter, and it kept nagging me to subscribe to a cloud product - if that's not an "issue on my computer" I don't know what is
(c) Current starting price for Photography Plan is £9.98 a month
I simply don't do enough photo editing to justify that kind of product or that level of ongoing expenditure, and if a free product or reasonably-priced purchase meets my needs I will use it. However, I do like to know the origin of my software: some developers are perfectly open about this, and others less so. The less they reveal the more cautious I become; it's sometimes said that if you get something for nothing, you become the product, so I always like to know who I'm giving myself to. With Pixbuilder/WNSoft that has so far not been possible.