Our internet explorer 10 on windows 8 keeps needing to be reset, we reset connection and it says 'The default gateway is not available - fixed'. This works for a few minutes then trips again and we reset again same issue.

Method 1:
Refer to the link and follow the steps in it to troubleshoot the issue:

“Wired and wireless network problems”

http://windows.microsoft.com/en-US/windows/network-connection-problem-help#network-problems=windows-8&v1h=win8tab1&v2h=win7tab1&v3h=winvistatab1&v4h=winxptab1

Check if it fixes the issue. If not, proceed to the next method2.

Method 2:
Let’s reset TCP/IP settings and check if it fixes the issue.

You can follow the steps:
a) Type“cmd” on the Start screen and select Command Prompt.
b) Right Click on Command Prompt and select “Run as an administrator”.
c) At the command prompt, type the following command and then press ENTER:
netsh int ip reset c:\resetlog.txt
Note: If you do not want to specify a directory path for the log file, use the following command:
netsh int ip reset resetlog.txt