I hope this helps
malwarebytes can be used for free and has worked for friends of mine that have had that problem.
I personally use a sandbox program (sandboxie) . I also use disk imaging software so I can redo my system in less time than you could make a cup of tea if I encounter any problems.
This is my partial list of my Rules of Computing (similar to Harry Brownes rules of investing)
Rules of computing
. Do not trust any program
. Use a Sandbox program
. Don’t open email attachments; even if it’s from someone you know. If you do get something from someone you know, make
sure that they really sent it to you. Email attachments are the number one way viruses and trojan horses get into your email.
You might also want to turn off HTML email in Outlook and other programs. HTML emails are just as dangerous as rogue web
sites, and can spread infections just by previewing them. (unless sandboxed)
. Don’t click links in email. That link could lead you to a phishing site, or the link may lead you to install malicious software.
Copy and paste links into your browser, or type them in by hand instead. Another reason to disable HTML email - the HTML
hides the real destination of that seemingly innocuous link. (unless sandboxed)
. Use an antivirus program . A basic free program like AVG works
. Use a firewall. The best firewall is a hardware router - the kind you use to share an internet connection. I also recommend
turning on your operating system’s firewall - even if you have a router - but I don’t recommend third-party software firewalls or
any complete internet security suites. They cause more problems than they solve.
. Don’t download files from places you aren’t absolutely sure are safe. Stick with the well known sites. Teeneagers who use file
sharing software like BitTorrent, Azureus, Kazaa, Morpheus, Grokster, and Limewire, often unwittingly download spyware and
trojans. If you must, quarantine all downloads in your sandbox then scan them a few days later with an updated anti-virus. Or
with online scanners
http://virusscan.jotti.org/en or
http://www.virustotal.com/
When using a public computer, it is important to safeguard personal information. For this reason, never leave a public computer
until you have made sure to log out of whatever website that you visited. Just closing the browser window does not suffice,
as the website can still retain the login information. Also, to further ensure privacy, never enter credit card or other financial
information into a public computer. As a last safety rule, be sure to clear your browsing history right before you leave the public
computer
. Do not forget the physical If you have a laptop and keep sensitive information on it what would you do if it were stolen
. You could encrypt you data or drives with
http://www.truecrypt.org/ and for the paranoid you could do this on all your computers
. If you have a wireless network at home learn to secure it
. Nothing can protect you from yourself most problems arise from a users mistake, get educated
Follow common sense this partial list should get you off to a good start