Date: 04/19/07 (Computer Help)    Keywords: software, browser, virus, web, spyware

SOLLUTION:
I had NETframework installed, which effected many applications on windows.
I uninstalled it.
Possible other problem:
Tag by mailware.

Thank you so much for your help!

I’m running Windows XP and I’m using BitDefender, Spybot and AdAware.

My problem:
My internet connection suddenly cuts off when I’m surfing the web. Usually, my messenger switches off first. I don’t think I would really notice if I didn’t have my messenger on, because my net-connection icon doesn’t switch off at all. Nor does my LAN-status-icon change.
It all started when I rebooted my computer a few days ago, and my computer suddenly asked me for my username and password. I never ever make a computer administrator account/user account and activate it, though I know it’s always there from the start. It’s driving me nuts!
I tried deactivating it, but it won’t let me. I can’t even change it or anything.
Maybe I installed some software that activated it. I don’t know.
I haven’t knowingly downloaded any malicious software and installed it ever since formatting my computer, and neither spybot, AdAware nor BitDefender find anything when I do a system scan.
Another odd thing is that BitDefender is now always trying to connect to the internet without being prompted to. I have switched off automatic updates, because I can’t stand it when I’m in the middle of doing something, and those updates start eating up all my MB RAM.
Anyway. When my connection breaks down, the connection-icon doesn’t vanish as it usually would. It shows me that I’m still online. When I double-click on it, a window opens and vanishes again instantly, though it shouldn’t. When I left-click on it and try to cut the connection, I don’t get a reaction. The icon doesn’t change.
What confuses me the most is that my messenger won’t reconnect, my browser won’t open any new sites, but the clip I’m watching over at youtube dot com won’t stop playing. As far as I know, internet connection is required for watching clips at youtube.
I’m very confused right now, and I really hope that all of this makes sense.

(again in short: 1) my browser and messenger seem to be cut off from the net, but the icons tell me I’m online – and so does youtube.
2) I can’t deactivate my local user account – which I myself have never activated
3) my spyware and anti-virus software doesn’t detect any infected or defect files/etc.)

Does anyone have any ideas?
Is my network card maybe messed up somehow? It’s brand new, but it was super-cheap.
Is my computer maybe infected with a virus or Trojan, that somehow manipulates my anti-virus and spyware software?

Your help and ideas would be greatly appreciated.

Source: http://community.livejournal.com/computer_help/770745.html