Important Notice:
1. This method works only W8 Pro to W8.1 Pro if you activate your Windows 8 Pro With Retail Keys.
2. It is only upgrading will not work clean installation.
3. Windows 8.1 WMC Edition does not work below methot!
Instructions:
1. Enable Show hidden files, folders and drivers to order to see and save all activation backup files
Control Panel\Appearance and Personalization
Then Checked Show hidden files, folders and drivers
2. You need to backup your Windows 8 activation files...
A. Automatic backup Windows 8 activation files
Download Advance Token Manager
http://joshcellsoftwares.com/products/advancedtokensmanager/
Click to start Application automatically backup activation files and save it in folder we need those 2 files.
data.dat
tokens.dat
or
B. Manual Backup Method
Go to this location and save spp folder in somewhere save in your other hard drive, partition, usb stick DVD etc..
C:\Windows\System32\spp\store\2.0
We only need 2 files.
1 file named data.dat which is hidden
1 file named tokens.dat which is visible
3. Download And Install Windows 8.1 RTM Pro Edition and use generic installation key when you are upgrading.
4. Stop sppsvc service
net stop sppsvc
5. Rename original data.dat file to cache.dat file and copy replace in the folder below: [from Advanced Tokens Manager/Windows Activation Backup to or from manual backup folder]
C:\Windows\System32\spp\store\2.0\cache
6. Copy & Replace the tokens.dat file from Advanced Tokens Manager/Windows Activation Backup to or from manual backup folder
system32/spp/store/2.0
7. Start sppsvc service back again
net start sppsvc
8. insert the key which you activated over the phone by using command pormpt
Type this script and hit Enter
slmgr.vbs -ipk <Your Product Key when you activate Windows 8>
Example of <Product Key>: XXXXX-XXXXX-XXXXX-XXXXX-6273P
Done..!
