2. If you’ve previously saved your usernames and passwords for e-commerce sites in Internet Explorer, it’s a good idea to delete these to stop would-be criminals getting their hands on them. Choose Tools, Internet Options and select the General tab. Click ‘Delete history’, ‘Delete passwords’ and ‘Delete forms’.
3. Before giving out your credit-card details online, make sure no one is eavesdropping. A router will provide a hardware firewall. Check that your software firewall is in place by choosing Start, Control Panel, Windows Firewall. Click ‘Change Settings’ if you want to block incoming connections.
4. You should be using an up-to-date version of your web browser, plus antivirus software that includes antispyware. To make sure Windows’ built-in antispyware is switched on, open Windows Defender and choose Tools, then make sure that automatic scanning and real-time protection are ticked.