@Beto-UIO 

Hi

It is recommended that you go to Control Panel --- Network and sharing center-- change adapter settings(on the left side)
Right click on Wireless network connection --- Status --- Properties
Then highlight Client for Microsoft Networks--- Configure.
At last, choose 802.11n Channel Width for band 2.4 and choose Value as Auto, then click OK.

  @José-TP , lastimosamente no existe esa opción he probado de muchas formas y la velocidad jamas supera los 54 mbps, me parece que es un fraude cuando venden algo que no cumple las especificaciones.

Joseph-TP wrote

  @Beto-UIO 

Hi

 

It is recommended that you go to Control Panel --- Network and sharing center-- change adapter settings(on the left side)
Right click on Wireless network connection --- Status --- Properties
Then highlight Client for Microsoft Networks--- Configure.
At last, choose 802.11n Channel Width for band 2.4 and choose Value as Auto, then click OK.

  @Beto-UIO 

Hi

TL-WN881ND has been sold for many years and it is for sure that the maximum wireless connection rate could reach 300m/s. However, the 2.4GHz Wi-Fi band is susceptible to interference from other wireless signals on the same frequency. 
To achieve a speed of 300Mbps, it's important to ensure optimal signal conditions：
1. please try to modify the 2.4GHz settings of the Host router, such as channel 11/channel width 40MHz.
2. Put the wireless adapter next to the Host router
3. Manually install the following driver if your pc is Win10: TL-WN881ND V2 Windows10

For more information you could refer to the following links:
How to improve the speed of TP-Link wireless adapters

Also, if you don't mind sharing, could you let me know when you purchased the adapter and when you first noticed the issue occurring?

Warm regards.

  @Joseph-TP los  compre hace 3 semanas 15 adaptadores de red, no funciona con la informacion proporcionada, existe demasiada intermitencia la velocidad no es constante y para copiar cerca de 900 mb se demora exageradamente he realizado las configuraciones en el eap y no funciona, en otrosequipos con wifi la misma cantidad se demora segundos

  @Beto-UIO 

Hi

Since the TL-WN881ND was end of life and is unlikely to receive any driver updates, it may not be fully compatible with your current computer system. Considering the need of high throughput for file transfer and the consistent support for 5GHz by the host router, the TL-WN881ND is no longer suitable and updating to the dual-band Wi-Fi 5 or WI-Fi 6 adapter is strongly recommended.

  @Joseph-TP Es lamentable que después de haber llegado al final de su vida útil lo sigan comercializando como una solucion de 300 mbps ya que el producto no cumple dichas especificaciones técnicas, de haberlo sabido hubiese adquirido el adatador wifi5 o 6 de doble banda, compre 15 de estas tarjetas y no me sierven más que para chatarra ya que no me las van a cambiar por otro producto y tampoco me brindan una solución tomando en cuenta que la compra la realice hace 3 semanas