You have posted in the Acrobat security forum, why not the Flash Player forum?
But the chances are that this is a scam. If it appeared when you visited a legitimate site the possibilities are
* site is hacked
* this is advertising on the site which is designed to hack
* your machine is compromised to offer bad pages
Google Chrome refuses to visit that site, saying it has been reported as unsafe. Unfortunately, copying a good web site and attaching to trusted brand names is a hacker's favourite trick. Adobe rarely have the power to close these things down, they are usually in a distant part of the world with different laws. To get software, if you are told you need it, ignore a popup and go to the original source (here http://get.adobe.com/flash ) .
I just sent an email explaining what happened to me, to Gatehouse Media (The parent company of Ocala.com). Hopefully they will be able to find the issue and secure their system.
Just scanned my computer, just in case... For the record: No viruses here.
Thanks for responding! I wasn't given a Flash Player Forum as a Community choice at the time, PLUS I felt it was more of a Security issue and would get noticed that way (and it did). A few searches of Adobe's site didn't find anything like this, so I thought Adobe should know about it.
I will continue to be careful about the beautiful but sometimes dangerous Internet !
When I get an alert from a Web site that Flash player needs update I never click on the link that this alert provides, I always go to adobe.com to update Flash player. Some malicious sites put out such alert to lure the users to click on their link and install malware. I was getting such alerts when I was sure that I had the latest Flash version installed on my machines.