In your post #12 “HP Website for DC7700 does not has no provision to check Windows 10 Upgrade” that’s pretty ominous but if you’d like to pursue the issue a little bit more, check out the following
Unfortunately your screenshots didn’t open on my computer or another at our senior center.
In your first post you mentioned
Windows 10 cannot be installed on this PC
There are no supported networking devices.
I can’t determine yet whether or not either one or both the Intel 82566DM Gigabit Network Connection & Linksys Wireless G Pcie Adapter are incompatible or can be updated to be compatible with Windows 10
--- I did find an Intel website I can go through and if I can find out about it I’ll let you know
--- It would be good to know the Linksys Wireless G Pcie Adapter make/model
I can’t explain why but maybe your attempts are failing because there isn’t any supported networking devices as far as Windows 10 is concerned for whatever reason.
--- If you can see if you can get an external USB Ethernet adapter that is Windows 10 compatible
Here is an example of one with system requirements that include Windows 10
Network Adapter, Anker USB 3.0 to RJ45 Gigabit Ethernet Adapter Supporting 10/100/1000 bit Ethernet
--- I am not proposing that this is the one to purchase but just as an example
You can also consider USB wireless adapter with system requirements that include Windows 10
Intel® 82566DM-2 Gigabit Network Connection overview
--- Unfortunately it doesn’t show a Windows 10 version
Edited by cmptrgy, 30 October 2015 - 08:53 PM.