Thanks Kaido. It's good to hear it does a decent job of finding drivers. I will image with Macrium as a safeguard. If I remember correctly that PC has a 2nd 250GB storage drive that I left unplugged to prevent unnecessary wear.
Another nice thing is that the "factory wipe' is built right into Windows 10, so if things get too goofed up, you can back up her files & nuke the OS back to zero, as if it were a fresh CD install. Super handy, especially because it will hop online to download the latest updates & drivers during the reset process. Usually you let the PC sit for 20 minutes or so after it gets back to the desktop to find bigger stuff like NVIDIA drivers automatically, and then reboot & run Windows Updates just to check. Some additional tips:
To verify activation: Start (flag icon in lower-left corner) > Settings (gear icon) > Update & Security (may have to scroll down to see it) > Activation (should say "Windows is activated with a digital license". Note that Windows 10 is permanently activated against the machine in the cloud (it basically takes a composite fingerprint of all of your computer hardware, so it will reactivate on a fresh install automatically if everything matches), so you won't need a key anymore after successfully doing the Win10 upgrade & verifying that its activated (make sure you are Internet-connnected & you may need to reboot once after the initial boot!). If you need to do a fresh install on say a new hard drive & don't want to clone it over using Macrium Reflect or whatever, you can create your own USB or DVD (ISO) install media here:
https://www.microsoft.com/en-us/software-download/windows10
To run updates: Start button > Settings (gear icon) > Update & Security (may have to scroll down to see it) > Windows Updates (default tab) > Check for updates
To reset back to a fresh install: (wipes everything - ALL files will be lost!) Start button > Settings (gear icon) > Update & Security (may have to scroll down to see it) > Recovery (should say "Windows is activated with a digital license" > Reset this PC - Get Started button > Remove Everything > Change Settings > Toggle the "data erasure" button to fully clean & wipe the drive 100%, then confirm & let it do its thing for a few hours
To free up space: (it saves Windows 7 so you can "roll back" if you don't like it...I recommend using the Macrium image because it's WAY more reliable) Start button > start typing in "disk cleanup" (there's no search bar in Windows 10, it's confusing, but it's like a "universal search", so just start typing anywhere after clicking on the flag in the lower-left corner) > open up the Disk Cleanup app > click on the "Clean up system files" button & let it search > select all & clean (this could free up as high as 20 or 30 gigs, depending on your installation!)
If she doesn't have a lot of files, I'd recommend getting her a free Gmail account, which gives you 15 gigs of free Google Drive storage space, which you can then (easily!) setup to sync her files to the cloud for free (I'd recommend putting on 2FA, btw). Create a folder on the desktop called "My Files", download the Google Backup & Sync software, and point it to ONLY that folder:
https://www.google.com/drive/download/backup-and-sync/
This will auto-sync (automatically backup) her files to the cloud, in case her PC bites the dust. Google also offers free unlimited cloud storage for photos (up to 16 megapixels each) and video (up to 1080p), so that won't hit your free Google Drive storage limit of 15 gigs:
https://photos.google.com/
You can pay for more Google Drive storage, or use Backblaze for unlimited backup for $5/mo (that's what I use, but if your mom is a basic computer user, she probably won't need that). Note that Google Drive is more of a RAID-style backup rather than an actual backup, because if she deletes a file in her Google Drive folder on her desktop, it will delete it in the cloud too. For local backups, Macrium Home edition is $70 - pricey, but (1) it does automatic daily incremental backups, and (2) it can use that 250-gig drive as backup & protect it from getting eaten by cryptolocker-style viruses:
https://www.macrium.com/products/home
For most people, that (free) functionality alone is a HUGE step up in computer safety. I also highly recommend getting her a paid copy of Malwarebytes, which now includes anti-virus built-in:
https://www.malwarebytes.com/pricing/?rec=premium
At $40 per year, it's like half the price of a lot of other antivirus systems, plus does a pretty good job of killing spyware & whatnot. I also recommend setting Google Chrome to be the default browser:
https://www.google.com/chrome/
Then installing the "uBlock Origin" ad-blocker plugin:
https://chrome.google.com/webstore/detail/ublock-origin/cjpalhdlnbpafiamejdnhcphjbkeiagm?hl=en
Then installing the Privacy Badger plugin:
https://chrome.google.com/webstore/detail/privacy-badger/pkehgijcmpdhfbdbbnkijodmdjhbjlgp
Is the primary drive an SSD? If not, you can get a 500-gig Samsung EVO for under $80 these days: (or like $55 for a 250-gig unit)
https://www.amazon.com/Samsung-500GB-Internal-MZ-76E500B-AM/dp/B0781Z7Y3S/
I'd say if you had a Q6600, 8 gigs of RAM, and an SSD boot drive, then that computer will rock Windows 10 for many years to come! Add in Macrium Home on that 250-gig internal backup, Google Drive & Google Photos for online sync, Malwarebytes for security, and Chrome with those two plugins for safety, then you're looking at a pretty nice, low-maintenance, and well-protected machine!