My neighbor threw away her old desktop which I decided to salvage, for parts if nothing else. I hooked it up to see if it was even working. It powered up. It tried to load what looked like Windows 10 and it couldn't. Then it would lose it's power. I cleaned out all the dust assuming it just might be overheating. Decided to put some new thermal paste on the CPU. It had only 1 GB (2 500 MB chips) memory, so I replaced it with two 1 GB chips, the maximum this system can handle apparently.
Tried it out again but the system kept shutting down. I assumed a damaged power supply and luckily I had a replacement. So replace it I did. But then I discovered the hard drive was crap. I couldn't access it at all. I took it out and tried to either access and or fix it by hooking it up to my computer, through a USB adapter. Still no luck. I had a spare hard drive but only a 300 GB's in size. So I placed that in the system instead.
Since it was using Windows 10, I decided to install Windows 10. With Windows 10 when you install it on a computer it gets licensed to that system so activation shouldn't be a problem, in theory. Even if I couldn't activate it, research on line suggests that the worst that will happen with Windows 10 is you'll lose the ability to use the customization options. Microsoft may change this at any time. But considering how desperate they are to force Windows 10 down everyone's throat... So I got Windows installed, should of took some pictures and made an article. This is just a test machine so I just might do that later on.
I used Ninite to install most of my programs, see: ninite.com
One program I installed is Foxit Reader - https://www.foxitsoftware.com/pdf-reader/ for PDF files but Windows 10 didn't setup it up as my default or main PDF reader. It insisted on Microsoft Edge as default reader.
I insisted on Foxit, so here is how to remedy that problem. This is for Foxit but it can apply to any program that you want to set up as default. So click on the Start button and click on the Settings button.
In the window that opens click on the Apps section.
Then click on Default apps on the left hand menu.
If you click on any of the default programs listed you'll get a pop-up list of all possible default apps that you can choose for that option. But PDF files and Foxit where not mentioned.
I scrolled to the bottom and clicked on the option, Set defaults by app.
In the next window I clicked on Foxit Reader. Then a button will appear with the word Manage on it. Click on it.
It shows all the extensions, handled by Foxit , .fdf, .ppdf, .xdp, and .xfdf But .pdf was originally set to Microsoft Edge. In my picture I already have it changed.
I clicked on the Microsoft Edge icon and up popped a window with other options for defaults. Then clicked on Foxit Reader. If you prefer your browser to handle PDF files leave it on Microsoft Edge or set it to your favourite browser.