1. Many people do not back up their computer file, so they lose a lot of data.
2. Many users don’t empty their mailboxes. As a result, they may have problems downloading their mail.
3. Because there is a serious threat from viruses, many people install an anti – virus program. หรือ
Many people install an anti – virus program because there is a serious threat from viruses.
4. Many employees do not know how to use basic programs effectively. Consequently, many companies offer IT training.
5. Since people use copies of programs, manufacturers puts in secret codes to detect copies. หรือ
Manufacturers puts in secret codes to detect copies since people use copies of programs.