It's very odd that device manager showed it greyed out even if it was called by the generic name prior to reinstall of the named driver.
Sometimes a reinstall of an updated brand name driver will correct things and sometimes just clearing the driver stack will do it.
You should keep that driver...
Uninstall the NIC and let Windows redownload fresh drivers or Reset the Network stack.
https://www.howtogeek.com/803098/how-to-reset-the-tcpip-stack-on-windows/
I just looked at your recommendation and I see that the weight is listed as 5.5lbs.
The PowerSonic is 6lbs.
My assumption has always been that the heavier one will last last longer due to a longer chemical reaction based on more mass.
Anything wrong with that idea?
There are also other components in the UPS that can get damaged and wear out before the 11 year warranty on the battery. If the UPS dies in 4 years, then what?
Edit: Over the years I've spent about $20 per battery plus shipping.
@Bill_Bright
Besides the places to buy you mentioned in post #3, DO YOU have a brand preference here in the USA.
I've been using the CSB brand for years.
Then there's PowerSonic, MightyMax, NPP, and others.
Leaning towards PowerSonic ...
It's been said already, alot. Change the PSU. Something 750watts, GOLD rated, but sometimes the 850 is the same price as the 750w.
You don't have the equipment to test it properly.
Your game crashing will get worse over a 6 month period, when the PSU degrades it will cause crashes in Windows...
So if you charge both batteries independently and let them sit for 2-3 days, one may show 12vdc and the poor/bad one may show 7vdc which is a fail.
Some good chargers will indicate that the battery is bad. Some good chargers will desulfate a battery.
You never take it off the charger and test...
Unit has 2, TWO batteries, if you test them independently you may find that ONE is dead (can't hold a significant charge) and the other is OK.
OR
They may both be weak and time for replacing both.
EDIT: You can take them out and charge them individually with a car battery charger. (a good one...