Here is a list of known changes:
1. “Send Feedback” on title bar removed (Source: My Digital Life)
2. “Windows 7 Business” now reads “Windows 7 Professional” in the installation
3. Paint icon changed
4. Calculator icon changed
5. Sticky Notes icon changed
6. Windows Media Center receives a version upgrade
7. Alt+Tab works with Aero Peek
8. 24-39% more icons available on taskbar before scrolling
9. Start button changed
10. Additional feature
Filename :- 7048_x64_Ultimate_EN_DVD
Size: 3.31GB
MD5 Hash: AD6F261F 6AC20FA0 F50F7DE7 54491863 A2DD16C2
How To Activate:
The 7048 build can be activated like all of the previous Windows 7 builds using a beta key from Microsoft to activate it.
More At; http://w7info.com/articles/2009/03/build-7048-64-bit-leaked-for-download/