can't access some web sites

I installed some porn blockers and as a result I could not access some websites. I removed the blockers and still can't load some sites. I have reinstalled safari, restated the computer, reset my router and nothing. HELP!

You may not have removed all the parts that you installed and you may need to include more info, but for a start, I'd suggest doing a shutdown, don't just restart, and then boot up again.

You may also want to boot up using Safe Boot Mode, run Disk Utility and Repair Permissions and Verify Disk and then reboot normally.

And not knowing what you installed, maybe even an SNC and PRAM reset might be in order.

Intel-based Macs: Resetting the System Management Controller (SMC)