Microsoft release IE 11 few days ago for Windows 7. It is already available for Windows 8.1 in Oct. 2013.
Here is the requirement to install IE 11 on Win7
Processor
- PC with a 1 gigahertz (GHz) 32-bit (x86) or 64-bit (x64) processor.
Operating system
- Windows 7 32-bit with Service Pack 1 (SP1) or higher
- Windows 7 64-bit with Service Pack 1 (SP1) or higher
- Windows Server 2008 R2 with Service Pack 1 (SP1) 64-bit
Memory
- Windows 7 32-bit—512 MB
- Windows 7 64-bit—512 MB
- Windows Server 2008 R2 64-bit—512 MB
Hard drive space
- Windows 7 32-bit—70 MB
- Windows 7 64-bit—120 MB
- Windows Server 2008 R2 64-bit—200 MB
Drive
- CD-ROM drive (if installation is done from a CD-ROM)
Display
- Super VGA (800 x 600) or higher-resolution monitor with 256 colors
Peripherals
- Modem or Internet connection
- Microsoft Mouse, Microsoft IntelliMouse, or compatible pointing device
For Windows 8.1 it is simply:
- A Windows 8.1 or Windows RT 8.1 PC.
- Processor: 1 gigahertz (GHz) or faster with support for PAE, NX, and SSE2
- RAM: 1 gigabyte (GB) (32-bit) or 2 GB (64-bit)
- Hard disk space: 16 GB (32-bit) or 20 GB (64-bit)
- Graphics card: Microsoft DirectX 9 graphics device with WDDM driver
- Internet access (ISP fees might apply)
