Do you know what WinFixer is?
WinFixer is a fake anti-spyware program that may display bogus or exaggerated error reports scaring users into thinking their computer has a multitude of parasite infections. WinFixer, when installed, may distribute malware on your computer. WinFixer generates annoying popups regardless if a user has popup blocker. Ultimately, WinFixer may attempt to get a user to purchase a registered version of the WinFixer program.
In non-techie terms: Distributors of rogue anti-spyware programs such as WinFixer conduct illicit installation methods to extort money from you. It is all part of a trap to get you to purchase a full version of WinFixer. Do not under any circumstances download or purchase WinFixer.