I think the only way BT runs in windows is on a virtual machine but can be booted from cd, hdd,usb. your slow internet speed could be caused by many things.
download this http://www.atribune.org/public-beta/ATF-Cleaner.exe
Under Main choose Select All, then Click the Empty Selected button.
then make a new system restore point and then download this.
update it but dont run it yet.
reboot your computer into SafeMode. You can do this by restarting your computer and continually tapping the F8 key until a menu appears.
use your up arrow key to highlight SafeMode then hit enter.
once your in windows dont start any other program besides AVG. start the scan and wait for that to finish.
there also another little prog here you can try
http://dw.com.com/redir?pid=10680864...-10680864.html just install and run.
Start/Control Panel/Switch to Classic View/Network Connections
right click on (local Area Connection) and choose properties.
on the general Tab you'l need to click on Internet Protocol (TCP/IP) then properties.
when a new window pops up make sure these two are ticked.
Obtain an IP address automartically
Obtain DNS server address automatically.
that might help with the conflict.
Theres other things you can do to get things running smooth but my post is getting long and i dont wanna bore you too much.