AC Adapter Error Message

Hi,

Just happened to me one hour ago. My internet connection was really slow so I decided to reboot my laptop: Alienware 17 R3. While rebooting a message appeared: (I do not have all the details, I searched it in google)

The AC power adapter type cannot be determined. Your system will operate slower and the battery will not charge. Please connect a Dell 180W AC adapter or higher for best system operation

The AC adapter type cannot be determined. This will prevent optimal system performance.
Strike F3 key ( before F1 or F2 key) if you don't want to see power warning messages again.

I switched off the laptop and switched on again, the same process and had the same error 3 times but the last time I let the computer boot by striking F3 and a recovery system message appeared so I was so scared that I switched off the computer. Then, I checked the plugs and connections of the battery, unplugged the wall plug outlet and plugged again, I have an extension socket with 6 sockets so I tried another socket, the message never appeared again neither the recovery system message.

I checked the BIOS, everything seems normal: "The battery is performing normally" and warning battery messages is "enabled" (I barely remember this option). I tried shuting down the computer and rebooting but this error have not happened again. I also unplugged the battery and waited to 90% to plug again and see if charges or not but seems that works fine and is charging. Also, the green light of the battery is working, is ok. The only incident I had after that happened was my internet connection not working after rebooting, my internet was not recognized but once again I rebooted and everything seems to be fine. This is all the things that happened until now that I decided to write here. I will reboot again and test the laptop.

I am very confused, in computing things don't broke and work again without any explanation. What the *** happened? What can I do? I can't see any relation between internet connection and the battery. Also this happened suddenly and suddenly worked fine.

Thank you in advance. I would appreciate your opinion.

Regards

Jorge