Protect your computer and take the following precautions;

1. Ensure you have a Firewall switched on. Either the Windows Firewall or one that may be included in your anti-virus package.
2. Ensure Windows is up to date with security patches. Go to Control Panel > Automatic Updates to switch this on or visit update.microsoft.com
3. Ensure you have anti-virus protection and most importantly that it is up to date. If you don’t have an up to date subscription to one of the commercial products, download the highly regarded AVG free product from free.avg.com. Whatever anti-virus solution you have make sure you update it regularly, otherwise you won’t be properly protected.