[Question] Am I infected? or its just Cloudflare in the sites?

Hello!
Sorry to disturb you. Sometimes when i want to enter some websites i have the message:
"One more step
Please complete the security check to access...(the website name/url)"

In the last part of the warning page it says:
"What can I do to prevent this in the future?

If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware."
and then in the bottom of the page it says:

Cloudflare Ray ID: 46b378af59954a54 • Your IP: blablabla
Performance & security by Cloudflare

That means am i infected ?
BTW i have Windows 7 64 bits. MalwareBytes will work with this? what do you think ?
I have Microsoft Security Essentials running and updated with last definitions.
Thank you!
Have a great day!

Thank you for your answers snICK ! as you said, i am not infected.
Good tips about the links you gave me also!

Have a great day!

Snick said:

Awesome CaLy,

Have a GREAT DAY!

Happy Computing!

I just knew why i am suffering this problem. Its not my computer, its the isp i am using.
It´s listed in SORBS.net
5 "Spam" entries [ GMT+].

NO! This does not mean you have any malware, and if you did it's unrelated.

CloudFlare allows website owns to create a captcha for IP addresses as well as whole ASNs. In addition to that, depending on your IP address CloudFlare may present you with a captcha. If you use Tor, you'll more then likely get a captcha connecting to a website that uses CloudFlare.

If you are constantly getting this then either reset/reboot your router in hopes of getting a new IP address, use the MAC address clone feature in the router and reboot the modem, or ask the website owner why your IP address gets a captcha.

I use CloudFlare myself for my websites so I full well know how it works.

You may also want to stay abreast of any and all router firmware updates. Don't use the default username and password for the router. Don't use UPnP and don't use port forwarding unless you absolutely need to. If your router has become hacked, then your IP address is used for nefarious activities, thus your IP is on a black list.