RESOLVED Detecting Security through web page

[wolve]

Hi all, ive been looking around for an example on how those anoying pop ups that detect whether my pc is infected with adware or virus work.
Now my question is:

Are they for real ? or is it just a dummy page?

If they are for real how can i biuld one, but not for anying pop purposes. I run a small biz in repairs,service & upgrades of pc's. What i would like to do is when a customer calls me with a adware/Virus problem there is always a customer that doubts what you are telling them (I guess its human nature). So if these pages are for real in detecting at least some adware/virus, i can direct my customer to this page where they can chek it out for them selves. And hope that this page can back up my advise.

I hope this makes sense.

Thanks in advance
Wolve