First, an explosion of unwanted pages hasn't anything to do with A2K; its a clear symptom of yuckware infestation. Go to
Safer-Networking-dot-Org and get Spybot S&D. While there, read the tutorial and pay particular attention to the procedures for updating Spybot and for configuring it to do a thorough scan. Once you've downloaded it, install it, update it, set it to "Immunize" (explained in the tutorial), then close it without running its scan.
Next, get
KazaaBegone which will cleanly remove Kazaa, though at some risk to your LSP stack, which could render you unable to access the internet. . When you download KazaaBegone, and
BEFORE YOU RUN IT be sure also to download
LSPFix, as recommended on the KazaaBegone download page. Read and understand the documentation for both before attempting to use either. Its not a bad idea to print them out for reference. If you follow instructions, you'll have no problem. If you don't "do it by the book", you probably won't like what will happen.
Disconnect from the internet, close all browsers and running apps, run Spybot's scan, and have it "fix" whatever it finds. The scan will take a good while to complete, btw; don't be impatient, just go do something else away from you 'puter for an hour or so. When Spybot has completed and fixed what it found (it may ask for permission to run at next boot - let it do so), reboot and run Spybot one more time anyway. It should run through a bit more quickly, and should find nothing. When Spybot has completed a pass without finding anything, close it, then run KazaaBegone. When KazaaBegone has completed, try to connect to the internet. If you can, fine. If not, run LSPFix, and you should be OK. Remember, read, understand, and follow all instructions.