Well, the title basically says it all.
This is an older desktop, and the card is likely even older than the desktop. It's a relatives desktop, and they're complaining that the internet signal will drop from their desktop (and no other laptop/desktop setup in the house). Then they have to do a series of hard shut downs/boot ups (normally 5-10 times) before the connection will be recognized again.
I fixed it once about a month ago, and figured it was likely the card going, and today I was called to help again, and I can't get it to work.
I tried updating drivers, deleting and recreating the entire network again, changing from a wpa2 to a general connection, but nothing helped.
Now I'm wondering which is the best upgrade card for the PC.