Possible Issues and Resolutions for Slow Connection Speeds in Windows XP
Most Virus and Spyware scans are likely to work better in Windows Safe-Mode.
In Windows XP, I have done this, no popups--
* Start | Run (type) "services.msc" (no quotes)
* Scroll down to "DNS Client", Right-click and select: Properties
* Click the drop-down arrow for "Startup type"
* Select: Manual, click Apply/Ok and restart.
(IF you are the only PC user, and not part of a domain.)
That also eliminates one SVCHOST process in Task Manager.
Blocking Unwanted Parasites with a Hosts File
And more speed can be done by setting your browser not to load images or pictures.