Icon Constantly Disappearing Then Reappearing Within A Second?

It's been doing this for over 7 or 8 hours now. And no, there's no network connection, that's what the problem is here. This is a Windows XP desktop.Basically what it's doing is within a second, this icon disappears from the taskbar, then reappears, over and over again: When I hover over it, it gives me a message about not being connected. I can't get the exact message screencapped and I can hardly even read it, it disappears too quickly.Sometimes it gives me this instead, and the connection works, but only for as long as this icon is there:But it disappears too quickly for me to load any pages completely, so they always end up being incomplete pages. When I hover over this one, it says acquiring network address.When I click repair, it gets stuck on "renewing IP address" every time, without fail.

Previously the internet connection would drop occasionally, but restarting the computer has always brought it back. I have tried this countless times by now, I have tried clicking repair, I have tried resetting the router, I have tried manually removing the connection then reconnecting to it, I have tried command prompt and running through the ipconfig flushdns, release, and renew commands, I have tried logging on as a different user account, I have tried uninstalling my wireless adapter software then reinstalling it, I have tried using a different adapter [I get a different error with that one], I have ran a scan with Malwarebytes' Anti-Malware then retried all these things, but that didn't fix it either. If my brother wasn't asleep I'd be wiping the hard drive by now as a last resort. And I will be doing this first thing in the morning if it isn't fixed.

There is one other computer on the wireless network, and its connection never drops. Ever. It's a Windows 7 laptop. There are two other computers in the house, but they both connect using the ethernet cable, and those never drop, either. The two Wiis, the Xbox 360, and the 3DS also connect wirelessly, and one of the Wiis drops occasionally as well -- and it's not connecting right now, either.There is one more PC in the house, which also runs Windows XP, but I haven't gotten it to connect in weeks and I've pretty much given up on it. It'd be nice to get that to run, too, since I have to share this computer, but it's 7 years old, it's just too old and is stuck on "acquiring network address" with either adapter, if I'm remembering right.

This is everything I know. This problem is still occurring, and it just occurred randomly today, while the computer wasn't even in use. I can connect to the internet with a wired connection, but stretching the wire across the house isn't something the homeowner wants me to do, so I can't keep it permanently, as much as I desperately want to.I looked around at a few other threads and there was some sort of Wifi program I can install? But it won't install. Or rather, the .net framework is what's not installing. So I guess I can't use that. Hope it makes finding the problem still possible though, this is the only computer I have left since my other one won't connect anymore either.