System requirements for installing Windows Defender
To install Windows Defender, you must be logged on as an administrator or be a member of the Administrators group.
Your computer, and all computers on a network for which you want to install Windows Defender, must meet these requirements.
| Software and hardware |
Installation requirements |
| Processor |
Pentium 233 MHz or higher processor (Pentium III recommended) |
| Operating system |
Microsoft Windows 2000 Service Pack 4, Windows XP Service Pack 2, or Windows Server 2003 Service Pack 1 |
| Random Access Memory (RAM) |
64 MB RAM (minimum); 128 MB RAM (recommended) |
| Disk space |
20 MB of available hard disk space |
| Web browser |
Internet Explorer 6.0 or later |
Note
- Windows Defender does not run on the Windows ME, Windows 98, or Windows NT operating systems.