Safari has been infected by virus

Question

Hello.  Earlier today while searching for a deleted email, I accidentally opened a different message in my junk folder.  Immediately, Safari was compromised.  A dialogue box showed up with the address www.webuniversally.com in it.  I am told that "Microsoft Windows detected a virus attack on my computer" and I'm told to "contact customer support" at a "toll free" number" I'm given.  I actually called the number and immediately felt it was not legit and hung up.  Now when I click on Safari, the same process keeps happening.  I cannot get online at all, and other functions (such as Reset Safari) are disabled.  I've tried shutting down and restarting, and I've used Time Machine to restore the system to a time before I opened the email, but I'm stuck and do not know how to proceed.  Can I remove this virus somehow?  My system is OS X 10.7.5.

Answer 1

The Safe Mac » Adware Removal Guide
Open Safari and select Safari's preferences. Click on the Extensions icon in the toolbar. Look for any strange extension and disable it, then uninstall it.
Helpful Links Regarding Malware Protection
An excellent link to read is Tom Reed's Mac Malware Guide.
For adware removal see The Safe Mac » Adware Removal Guide and The Safe Mac » Adware Removal Tool.
Also, visit The XLab FAQs and read Detecting and avoiding malware and spyware.
See these Apple articles:
  Mac OS X Snow Leopard and malware detection
  OS X Lion- Protect your Mac from malware
  OS X Mountain Lion- Protect your Mac from malware
  OS X Mavericks- Protect your Mac from malware
  About file quarantine in OS X
If you require anti-virus protection Thomas Reed recommends using ClamXAV. (Thank you to Thomas Reed for this recommendation.)
From user Joe Bailey comes this equally useful advice:
The facts are:
1. There is no anti-malware software that can detect 100% of the malware out there.
2. There is no anti-malware that can detect anything targeting the Mac because there
     is no Mac malware in the wild, and therefore, no "signatures" to detect.
3. The very best way to prevent the most attacks is for you as the user to be aware that
     the most successful malware attacks rely on very sophisticated social engineering
     techniques preying on human avarice, ****, and fear.
4. Internet popups saying the FBI, NSA, Microsoft, your ISP has detected malware on
    your computer is intended to entice you to install their malware thinking it is a
    protection against malware.
5. Some of the anti-malware products on the market are worse than the malware
    from which they purport to protect you.
6. Be cautious where you go on the internet.
7. Only download anything from sites you know are safe.
8. Avoid links you receive in email, always be suspicious even if you get something
    you think is from a friend, but you were not expecting.
9. If there is any question in your mind, then assume it is malware.