Can't change Workgroup name in Windows 8

I just installed a fresh copy of Windows 8 Pro on my desktop and a hard drive failure :mad: then tried to change the Workgroup name. I attempted to change the name by right clicking on the Computer icon then selecting the Properties option. I then selected the "Change settings" option in the "Computer name, domain, and workgroup settings" section to get the "System Properties" window to come up. When the "Computer Name/Domain Changes" window comes up, the "Workgroup" field is grayed out so I can't change it to what I want. :confused:

Any idea why I can't change the Workgroup name? I had the same machine with Windows 8 Pro running with my custom named Workgroup name before the hard drive failure so I don't understand why it doesn't allow me to change the Workgroup name now.

Thanks for any suggestions.

Mark

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 8 Pro, 32 bit
Processor: Intel(R) Pentium(R) D CPU 2.80GHz, x64 Family 15 Model 4 Stepping 4
Processor Count: 2
RAM: 3070 Mb
Graphics Card: Microsoft Basic Render Driver, 11 Mb
Hard Drives: C: Total - 953866 MB, Free - 912348 MB; F: Total - 953866 MB, Free - 623208 MB;
Motherboard: Dell Inc., 0X8582
Antivirus: Windows Defender, Disabled