Which of the following are the types of updates in Windows 7? Each correct answer represents a complete solution. Choose all that apply.

A.
Important

B.
Recommended

C.
Optional

D.
Common

Explanation:
The various types of updates in Windows 7 are as follows:
1. Important updates: Important updates provide improved security, privacy, and reliability. They should be installed as they become available, and can be installed automatically with Windows Update.
2. Recommended updates: Recommended updates address non-critical problems or help enhance the computing experience. While these updates do not address fundamental issues with the computer or Windows software, they can offer meaningful improvements.
These can be installed automatically.
3. Optional updates: Optional updates can include updates, drivers, or new software from Microsoft to enhance the computing experience. A user can only install these manually.