Different License types
There are 3 different types of licenses with corresponding dvds for Windows Server 2008 R2: Volume License, OEM and Timebased Evaluation. All these licenses have different time limits before you have to activate in order to continue using the Operating System. There is a possibility to reset the evaluation period for a few times which is called “rearming”. This method is also explained in the Microsoft Knowledge Base. The different licenses with corresponding DVD-image, hashes and evaluation times are as follows:
Windows Server 2008 R2 Evaluation English (TIMEBASED_EVAL) – Usable: (10 days + 5 * 10 days using rearm) + 180 days after activating = 240 days
Filename: 7600.16385.090713-1255_x64fre_server_eval_en-us-GRMSXEVAL_EN_DVD.iso (download)
Windows Server 2008 R2 OEM English (RETAIL) – Usable without activation: 30 days + 3 * 30 days using rearm = 120 days
Filename: 7600.16385.090713-1255_x64fre_server_en-us_OEM-GRMSXFREO_EN_DVD.iso (only available for OEM manufacturers)
Windows Server 2008 R2 VL English (VOLUME_KMSCLIENT) – Usable without activation: 30 days + 3 * 30 days using rearm = 120 days
Filename: 7600.16385.090713-1255_x64fre_server_en-us_VL-GRMSXVOL_EN_DVD.iso (only available for MSDN and TechNet subscribers)
As you can see you can use the evaluation version of Windows Server 2008 R2 for free for 6 months and even for more than 7 months if you use the rearm method described below!
2. If you have less than one day left rearm your license so you have 10 days left again. To do this click Run in the Start menu, enter slmgr.vbs -rearm and click OK. After a few moments a window will popup that shows you the rearm has been completed and you have to restart your system.
Checking rearm count left
Removing Desktop Watermark
2. After downloading the zip extract the zip, run install.cmd as an Administrator and follow the instructions on the screen. After a successful installation, reboot your pc to remove the watermark. If you want to do this manually, open %SystemRoot%\System32\en-US\user32.dll.mui with a resource editor and replace the strings in the following resources with a space (” “): 45.715, 45.716, 46.* and 47.739.
If you get a sharing violation error during the installation, try running it again in Safe Mode. I Couldn’t test it myself because for some reason I can’t get into Safe Mode. Please confirm this works!