Cerberus, an IPsec implementation from NIST. This implementation contain many different encryption cypher (including all the AES finalists), but is subject to US export controls.
If your explorer session has stopped responding, hit CTRL+SHFT+ESC to bring up taskmanager. On the processes tab, look for explorer.exe in the Image Name column and hit the End Process button. Your windows session will now seem to disappear. It can be restarted in taskmanager by going to File>New Task (Run) and typing explorer.exe.
Set up a firewall. Even if you just use dial-up or DSL you are fully exposed to the internet.
This is your primary defense and protects against outside attacks by screening and blocking all traffic between your network and the Internet that is not allowed. The firewall also hides computer addresses. Firewall hardware connects between the cable/ DSL modem and your computers. Windows operating systems have great built-in firewalls.
Folder views.
If you want all your files and folders to be listed the same way in Explorer, display the format you want in the right pane, e.g. details view, sorted by file type. Then Tools>Folder Options and the Views tab. Hit the Apply to All Folders button and the next time you traverse to a folder it will be in your "standard " display format.
An average of $1,300 is spent per employee in companies of $10m revenue or less.
This is 10 times greater than companies with revenue of $100m - $1bn. Unable to realize the economies of scale, smaller companies spend disproportionately higher amounts on security - learn how to leverage lessons learnt by larger companies.
Who is using your computer?
Don't leave your computer whilst you are logged on. It only takes a moment for someone to send an email with your account. Always shut down at night and set a password for your screen saver so your PC will remember even if you don't.
