It means that one of the anti-virus components is not running. To find out exactly which of them are, roll the mouse cursor over the Dr.Web icon in the notification area and in the pop-up notification window read which components are not running. The possible cases may be as follows:
- SpIDer Guard is disabled
- SpIDer Gate is disabled
- SpIDer Mail is disabled
- Firewall is disabled
- Virus databases are out of date
- All the components are disabled