Microsoft Windows is a series of graphical interface operating systems developed, marketed, and sold by Microsoft. Microsoft introduced an operating environment named Windows on November 20, 1985 as a graphical operating system shell for MS-DOS in response to the growing interest in graphical user interfaces (GUIs).  Microsoft Windows came to dominate the world’s personal computer market with over 90% market share, overtaking Mac OS, which had been introduced in 1984. As of April 2014, the most recent versions of Windows for personal computers, smartphones, server computers and embedded devices are respectively Windows 8.1, Windows Phone 8.1, Windows Server 2012 R2 and Windows Embedded 8.
Direct Download Links
How to upgrade ?
1. Search Windows Anytime Upgrade.
2. Launch Windows Anytime Upgrade.
3. Enter any upgrade key. ( listed down below )
4. Wait and after it verifies.
5. Your computer will begin upgrading.
6. After it upgraded run Windows Loader by Daz ( Link below )
7. Click install and after that’s done
8. Your Windows 7 will be ultimate and genuine.
Serials Keys:
ULTIMATE
(OEM-8992662)
=====================

FJGCP-4DFJD-GJY49-VJBQ7-HYRR2 --- XXXXX-OEM-8992662-00006 --- ACER/GATEWAY/PACKARD
VQ3PY-VRX6D-CBG4J-8C6R2-TCVBD --- XXXXX-OEM-8992662-00008 --- ALIENWARE
2Y4WT-DHTBF-Q6MMK-KYK6X-VKM6G --- XXXXX-OEM-8992662-00173 --- ASUS
342DG-6YJR8-X92GV-V7DCV-P4K27 --- XXXXX-OEM-8992662-00400 --- DELL
9CW99-79BBF-D4M3X-9BK9M-4RPH9 --- XXXXX-OEM-8992662-00009 --- FUJITSU
MHFPT-8C8M2-V9488-FGM44-2C9T3 --- XXXXX-OEM-8992662-00010 --- HP
6K2KY-BFH24-PJW6W-9GK29-TMPWP --- XXXXX-OEM-8992662-00537 --- LENOVO/IBM (Re-released)
49PB6-6BJ6Y-KHGCQ-7DDY6-TF7CD --- XXXXX-OEM-8992662-00015 --- SAMSUNG
YJJYR-666KV-8T4YH-KM9TB-4PY2W --- XXXXX-OEM-8992662-00016 --- SONY
2WX6M-X2HKM-86X8X-2QD44-F3FGJ --- XXXXX-OEM-8992662-00481 --- ?????
78FPJ-C8Q77-QV7B8-9MH3V-XXBTK --- XXXXX-OEM-8992662-00366 --- ?????

Note : This is only for Windows 7 Basic , Starter , Home , Home Premium and Professional
So any version below Ultimate.

Windows Anytime Upgrade is built in so no need to download.
For Activation of Windows 7 Open Below Link