Do you already have an antivirus program installed? Antispyware/antimalware? If so, you might need to update, or even replace them with better options. If not, well, you should've.
But you probably still can anyway - for example, if you go to
http://pack.google.com and select just Spyware Doctor (you could add more free stuff at a later point if you wanted to) you'll have a pretty decent antispyware program ready to go in no time.
If you have genuine Windows installed, you could've got Windows Defender from Microsoft/Windows Update. I suggest doing so in future, should you get the opportunity.
Other ones I've tried include SuperAntiSpyware (from
http://www.superantispyware.com), and Spybot - Search & Destroy (from
http://www.safer-networking.org/en/spybotsd/index.html).
With one or two of these, you might have to specify that no, you don't want such and such a toolbar or whatever (can't remember which ones sorry, just keep an eye out during installation - and this goes for any program ever - if you decide to give them a go); these are *optional* bits of *ad*ware,
not unavoidable, let alone spyware themselves.
I would suggest having two or three antispyware/antimalware programs installed, in total, and running them one at a time immediately upon installation (they'll generally offer this option,
IIRC). Update straight away and then scan, or vice versa - again, they'll probably offer up one of these options by default.
My favourite free antivirus program for Windows XP is 'Avast!'. You can get that from
http://www.avast.com - again, with no strings attached. Just make sure you don't have any other real antivirus installed, before adding another one!
Just my 2c. If you can't download anything helpful, or install them, or run them, I did come across soem manual removal instructions for the spyware you've got, and they might work.