I bought this Dell D820 used from a non-NewEgg Vendor from the NewEgg website for $120. It arrived today and I've been testing it out. It seems fine via LAN, but the wireless connection speed is pitiful.
0.12 Mbs (Down)
0.38 Mbs (Up)
Ping = 1222 ms
3.60 Mbs (Down)
1.15 Mbs (Up)
Ping = 143
I've uninstalled and reinstalled the Dell Wireless 1390 WLAN Mini-Card in Device Manager using drivers downloaded from Windows Update, thinking maybe previous malware had corrupted the WLAN's drivers.
I've run "Windows Repair" from Tweaking.com, to reset/repair permissions and re-enable any Windows Services that might not be working.
It feels like I'm circling around this thing, but the only way I can think of to definitively condemn the hardware is by replacing it. eBay sells WLAN cards that Vendors claim are compatible with a Dell D820 for about $5.00. So that's "Option A".
I don't have an "Option B", hence this post. I'd hate to delay the repair and waste the money on a card that won't work because of a software/driver issue, or whatever.
Random Questions and Thoughts:
1) The Dell specs say the D820 shipped with WinXP, and it now has Win7. Device Manager shows all drivers as installed normally, and everything seems to work except the wireless.
2) The Vendor sells these as "refurbished", but I wonder if they weren't BROKE, and maybe it's still BROKE. Maybe replacing the WLAN card is the solution. If so, there's some ambiguity about these cards. Device Manager shows it as a "1390", and the Dell Specs (that I've seen) do not name a specific Wireless card. I wonder if this is the card it shipped with, or if the Vendor replaced it with a 1390 because the original was either broken, or not compatible with Win7 (drivers).
I don't know much about wireless cards for laptops. Are they all "one size fits all"? Is there an opportunity to "upgrade" in some way. Example is a $5.00 WLAN card from eBay "good enough". Will it even work? How do I find out what originally shipped with this laptop?
3) I've read about "driver clean-out" programs, which are marketed with the idea that sometimes the same old, bad, broken driver gets reinstalled and the only way to make sure it doesn't is to completely delete it from the computer and install a new one. Is this worth trying? What "driver clean-out program" should I use?
4) Does it make a difference that I got the WLAN's driver from Windows Update and not directly from the manufacturer? (What if the manufacturer's driver is not for a 1390? Then what?)
5) Also in the back of my mind this "super slow wireless internet connection" problem has provoked an alarm bell ringing, like I've either seen this before, or read about it, and there's some kind of "magic bullet" solution. Maybe commonly caused by a particular malware, or maybe Combofix needs to be run, or something. I wonder if the "refurbished" computer used to be infected and may still be? Or there is still System File damage? I like Windows Repair from Tweaking.com, but nothing fixes everything.
Anyways, that's what I've got. Hope I get some help. Thanks in advance.
Edited by Aaron_Warrior, 25 March 2017 - 11:29 PM.