Is it true like it work on window vista window defender because like when a virus is found does the window defender on window 7 remove it right away or it alert you because i don't feel like my window defender working perfectly

Dtran,Defeneder is an anti-spyware program to try and "help" keep your system clean. It is not inteneded to be a panacea of happiness on your system. If it's virus protetction you're after, you need to ensure you have a proper Anti-Virus program installed as Defender isn't an A/V program of sorts.Justin