Signs that your computer may be infected with spyware or adware include pop-up windows; frequent computer crashes; strange hard-drive or modem behavior; an unusually slow computer or Internet connection; and strange charges on your credit cards, identity theft, or phone charges to 1-900 numbers. Even if you notice none of these, spyware probably is present on your computer. AGuardDog Adware Spyware Remover scans your computer for spyware and ad..