I'm experiencing slim keyboard not being recognized in the Windows 8.1

The keyboard was working fine until one day it just stopped working.

I've always been careful of fragile keyboard so I thought this was software issue.

After backing up everything, I tried factory reset literally 8 times (both system recovery and clean)

I have most recent BIOS updated (April 2016 A 18) and all dell's recommended update from its software.

I also tweaked power setting --> disabling power saving on USB

But it still come up as unrecognized each time.

I was wondering if this really is a hardware issue or just software bug from factory reset.

----------------

I have ProSupport warranty and was wondering if this covers slim keyboard as well?

----------------

Below is the error on my device manager.

Log Name:      Microsoft-Windows-Kernel-PnP/Configuration
Source:        Microsoft-Windows-Kernel-PnP
Date:          8/6/2016 1:09:35 PM
Event ID:      411
Task Category: None
Level:         Error
Keywords:
User:          SYSTEM
Computer:      Dell
Description:
Device USB\VID_0000&PID_0002\5&1347b1a9&0&4 had a problem starting.

Driver Name: usb.inf
Class Guid: {36fc9e60-c465-11cf-8056- 444553540000}
Service:
Lower Filters:
Upper Filters:
Problem: 0x2B
Status: 0x0

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