Troubleshoot:Cannot connect to Router via wireless or Ethernet cable unless router is unplugged and replugged. Error

Cannot connect to Router via wireless or Ethernet cable unless router is unplugged and replugged.

I recently switched ISP and with the new provider I cannot establish a connection unless the router is unplugged and then plugged back in.
The repair connection function does not work.
I had 2 technicians from the company and the latest one said that Windows
will not release the old IP? They even installed a new NIC and the same result.
With the previous provider it did not do this.
Is there a fix for this?
I have a 2wire router and Windows with SP3.

Keys to the Problem Cannot connect to Router via wireless or Ethernet cable unless router is unplugged and replugged.

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Check if there are memory problems

Memory management issues can also cause a BSOD in Windows 7. Thankfully, Windows 7 has a Memory Management Diagnostic tool that detects and solves problems related to system memory.

1. Click on the Start button on the Taskbar.
2. Type "Windows Memory Diagnostic Tool" or "Memory" (without quotes) in the Search box or,
3. Click on Windows Memory Diagnostic Tool (in the search results).
4. Click on "Restart now and check for problems (Recommended)".
5. The system will restart, and you need to follow the instructions given on the screen.

Another Safe way to Fix the Problem: Cannot connect to Router via wireless or Ethernet cable unless router is unplugged and replugged.:

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