connection problems, WindowsLiveOneCare and TrendMicroHousecall

I try to download the scanning tools from WindowsLiveOneCare free online scan
and IE8 freezes. This does not happen with any other application.
Being quite suspicious now after internet connection problems and recent 5
BSOD which I looked at in Event Viewer(suggesting the possiblity of a
Backdoor and a SPbot or something as possible causes.
The BSODs suggested tcpip.sys was a problem, to update drivers though I am
pretty darn sure all the drivers are up to date from Intel. Motherboard is
D945 LGA775.
I then tried TrendMicro online Housecall and once I try to install Java
6.14 the Java update does not want to install.
I am using Avas Free Home edition antivirus and Firewall in XP Home Edition.
I keep the pc maintained of, DiskClean, Defragment Tool and DiskCheck all
having been run.


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....scribble scribble scribble...