windows ip configuration an internal error occurred: the request is not supported
Follow the methods and check:
Method 1: You may refer the below mentioned Microsoft Knowledge Base article and check.
"Error 1068" Error Message When You Try to Turn On Internet Connection Sharing
Method 2: Try performing SFC (System File Checker) scan on the computer.
To run the System File Checker tool, follow these steps:
a. Click Start and click on Run, then type cmd in the Start Search box.
b. Right-click cmd in the Programs list, and then click Run as administrator.
c. If you are prompted for an administrator password or confirmation, type your password or click Continue
d. At the command prompt, the following line, and then press ENTER:
Refer the article for more information:
Description of Windows XP and Windows Server 2003 System File Checker (Sfc.exe)
System File Checker (sfc)
Let us know if this helps.