Lately there have been many user complains on mal-ware/spy-ware attacks. Today the coding of these mal-ware/spy-ware software are much more advanced than they used to be. It can install on user system through any attacked website without notice. I recomend installing Windows Live OneCare software. It's a great protectoion/cleaner software to use aside from having an Anti-virus software.
There are many cleaners out there that tend to clean up your Windows system files and registry, which cause more harm than good to your Windows operating system and your third party software.
To run Windows Live OneCare Scan, go to: