A Link Scanner is a program that you install on your computer that automatically checks for viruses or malware on the website you are about to visit.
There is also a Website you can go to... to manually enter a www.company.com website address.  (This is great to check your own website! -- to see if your website has been hacked.)

If you are using Trend Micro Internet Security, Trend Micro has its own built-in link scanner called TrendProtect.
Installing a 2nd link scanner may cause problems - unless you disable the internal link scanner.
Ditto with the other brands of anti-virus software like AVG, Avast, etc.
 

A Link Scanner is a program that you install on your computer that automatically checks for viruses or malware on the website you are about to visit.
There is also a Website you can go to... to manually enter a www.company.com website address.  (This is great to check your own website! -- to see if your website has been hacked.)

If you are using Trend Micro Internet Security, Trend Micro has its own built-in link scanner called TrendProtect.
Installing a 2nd link scanner may cause problems - unless you disable the internal link scanner.
Ditto with the other brands of anti-virus software like AVG, Avast, etc.
 

To manually scan a website for threats, click here.

After checking to see if the anti-virus software on your computer has a Link Scanner built in,
if it doesn't, you can install Grisoft's AVG Link Scanner, a separate software that is free, here.

"Free" anti-virus software is no longer enough to protect the computer.
July 2010:  1USA recommends Avast Pro anti-virus software or Avira Premium Security Suite. Both are the "middle" one on their page.
I recommend these two because they are better than AVG, Norton, McAfee and the other brands of anti-virus software in our tests at 1USA... and I am in constant contact with computer repair shops who prefer these brands also.
BarryZ

The best way to check a computer for viruses is to have a computer with Avast Pro installed, and another computer with Avira Premium installed, and you'd plug in your hard drive into these computers as a Drive D (or E, or F) and scan them.  It takes hours to do a good job.

To manually scan a website for threats, click here.

After checking to see if the anti-virus software on your computer has a Link Scanner built in,
if it doesn't, you can install Grisoft's AVG Link Scanner, a separate software that is free, here.

"Free" anti-virus software is no longer enough to protect the computer.
July 2010:  1USA recommends Avast Pro anti-virus software or Avira Premium Security Suite. Both are the "middle" one on their page.
I recommend these two because they are better than AVG, Norton, McAfee and the other brands of anti-virus software in our tests at 1USA... and I am in constant contact with computer repair shops who prefer these brands also.
BarryZ

The best way to check a computer for viruses is to have a computer with Avast Pro installed, and another computer with Avira Premium installed, and you'd plug in your hard drive into these computers as a Drive D (or E, or F) and scan them.  It takes hours to do a good job.