Wifi realtek rtl8723be wireless lan 802.11n pci-e nic driver

You may have a bad driver.  There are hundreds of "driver download" web sites on the web.  They are like poison.  Full of malware and bad drivers.  Accept drivers ONLY from the OEM of the equipment.

Make certain you have not physically turned off WiFi.  There may be a switch on the PC somewhere.  It could be a key combination.

Then, download the proper driver you will find from Realtek (the OEM)

https://www.realtek.com/en/component/zoo/category/rtl8723be-software

Install that driver.  

If you still cannot get that to work, it is likely the hardware is failing.

You can buy a plug in USB wireless device for about $20.   They are tiny, portable, and frequently work better than the internal ones.

Another note:  Drivers are not like other software.  They should never be updated unless there is a specific problem you need to solve and it relates to that driver.  Then only the affected driver.  Most PCs will never have a driver update.

Open Device Manager

Right click on the wireless driver

Choose uninstall

Restart your computer

On restart, the computer will reinstall the driver

What is the make and model of your computer?  IS the WiFi adapter part of the original computer?  What is your OS (operating system-Win7, Win8, Win10? or please verify Win7)?  Is your Data Backed up?

How did you reset your computer (what method did you use)?

If a HP see:

https://h30434.www3.hp.com/t5/Notebook-Wireless-and-Networking/Realtek-RTL8723BE-802-11-bgn-Wi-Fi-Adapter-not-working/td-p/6712211

I have tried everything in previous posts about the WIFI being disabled from the service adaptor - i have reset my computer, I have reset network settings and I no longer can access wifi from laptop. All other devices have wifi.  This was working and within minutes stopped. How do i reinstall this driver?

I have tried everything in previous posts about the WIFI being disabled from the service adaptor - i have reset my computer, I have reset network settings and I no longer can access wifi from laptop. All other devices have wifi.  This was working and within minutes stopped. How do i reinstall this driver?