All entries for Saturday 16 October 2004
October 16, 2004
What are hackers?
Hackers are people who attempt to gain unauthorised access to computers and networks. Hackers gaining access to your computer could potentially edit or remove your files, or install malicious programs. However, hackers are mainly interested in corporate networks where the challenge is bigger and the rewards are greater.
How can I block hackers?
You can block hackers by using a firewall program on your computer. Firewalls can also improve the general security of your computer by preventing malicious programs from being downloaded, and not allowing websites to monitor your surfing activities.
Firewalls are typically included with internet security packages. ZoneLabs' ZoneAlarm is a powerful and highly customisable firewall. If you are using Windows XP you can use its built-in firewall. For the best internet security you should install Service Pack 2 for Windows XP, as well as regularly updating Windows. Once installed, Service Pack 2 will automatically activate Windows Firewall and improve the security of Internet Explorer. Service Pack 2 is free to download or a CD can be ordered from Microsoft. To download the service pack, go to Windows Update on Microsoft's website by clicking on the following link:
Before you install Service Pack 2, you should check that your computer is not running any programs which are incompatable with it. Visit Microsoft's website for a list of incompatable programs:
For more information about dealing with compatablility problems visit:
Don't forget to keep checking for security updates for Windows and all your security software.
What are viruses?
Viruses are programs that are able to replicate themselves. Generally they spread via the internet, because in this way they can infect many computers very quickly. Virus programmers are writing new viruses all the time, and different viruses are designed to do different things. Some viruses are just annoying jokes, whilst others are capable of corrupting and removing your files.
How can I remove viruses?
You can use an anti-virus program to search for and destroy viruses. Some anti-virus programs also prevent viruses from installing, by scanning email attachments and downloaded files (which may have viruses attached) as soon as they arrive on your computer.
If you are studying at Warwick you can share the university's Symantec Norton Antivirus licence, which means you can get the anti-virus program and updates for free. To download Norton Antivirus, or to download the necessary patch if you have Service Pack 2 installed on Windows XP, click on the link below:
Before you install Norton Antivirus, be sure to first uninstall any other anti-virus software you might already be using.
When you have installed Norton Antivirus, you should run Live Update as soon as possible to get the latest virus information, and then scan your computer. You should then continue to run and update Norton Antivirus frequently (at least every few days).
The removal of some malware may require special tools, rather than your virus scanner. Some worm removal tools are available from Symantec:
If you think your virus scanner might have missed some malware, get a second opinion. There are various free online scanners – try Panda ActiveScan:
What is spyware?
Spyware is a general name for spying programs that try to obtain information about you or your computer. These programs can be downloaded onto your computer without your knowledge whilst you are connected to the internet. Some spyware programs monitor your surfing activites and are used by advertising companies to try to find out what sort of products you would buy so they can target you with pop-up adverts and spam emails. Other spyware may be used to steal your passwords and bank details.
How can I remove spyware?
You can use a spyware removal program to search for and destroy spyware. Some spyware removal programs are included with internet security packages that you can buy, or alternatively you can download a free program such as Ad-Aware. This will search for and remove spyware both on your hard disk and in your computer memory:
Like anti-virus programs, spyware removal programs will need to be run and updated frequently to ensure that your computer is secure. Unlike anti-virus software, you can use more than one spyware removal program on your computer. Microsoft are developing a spyware blocking and removal program, which should be available as a free download when the final version is released. Panda's free online scanner is now able to detect (though not remove) spyware, as well as viruses:
Ad-Aware is known to be reliable and effective, and is probably the best option for most users at present.