I'm glad everything worked out for you. Thank you Essexboy for checking the OTL logs.
Since there have been several software updates recently (and this is ongoing), I would recommend that you check out
Secunia Software Inspector to make sure you have the latest software patches:
http://secunia.com/vulnerability_scanning/personal/, as well as checking the Avast "General Topics" section of the forum for updates on software or security warnings. Secunia will give you the vendor's direct download for a patch if one is needed. Remember to reboot after an uninstall and again after an install.
I'm not sure if you are using a system cleaner, but many of us use
CCleaner - a freeware system optimization, privacy and cleaning tool. There is a
Slim version available as well at
http://www.piriform.com/ccleaner/builds - 4th option down. It removes unused files (cache, temporary Internet files, etc.) from your system, allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history. Additionally it contains a fully featured registry cleaner; I recommend making a backup prior to using the registry cleaner.
You can also keep your machine running smoothly with free
Puran Defrag http://www.puransoftware.com/. It includes a boot-time defrag as well, and works with 64-bit; click on "More Info" to learn more about the product.
Most importantly, try to learn from your experience as to how you got infected. Use safe browsing practices, adjust your browsers for maximum protection, and layer your lines of security defense by using on-demand tools like MBAM (there are others as well) in addition to your regular AV and FW. XP Windows FW is not effective enough (only 1-way protection) and a third-party FW is strongly recommended for 2-way protection.
Let us know if you experience any additional problems.