Forgot my password for my wifi connection

we do no not know what PC you have at all make and model.
but a Desktop most times 99% came with no wifi? (real disktops not AIO, are a different beast) AIO = all in one .
so what is connected?, wifi or Ethernet, are you at home or at STARBUCKS? (or the like)
where are you first (standing)
and are wifi are you near your wifi router or modem.
why is phone mentioned, I guess you meant.
1: wifi is dead at home,
2: the decktop wifi added after new PC is dead. on wifi
3: the cell phone is dead on wifi but 3G works.

so you router needs to be reset or you forgot your credentials to it.

To connect your Iphone to home wifi you should go into the 'Settings' app then there should be a option where you can click on 'Wi-Fi'. If the wifi is on you should see green next to wifi. Under 'Choose a network' select your home wifi. If it is password protected it will ask you to put in your password, if not it should automatically connect.

If you check your own wifi password than go to wifi setting and click Show characters check box but if you are using router and forgot your wifi router than try to reset your router wifi password. If you need any technical guidance than follow Mac Technical Support .

When you're at home, you're connected to your own wifi for which you have entered the password into your phone at some point. If you're away from home, you would need to be either connected to an open wifi network (not password protected) or have the password to any wifi hotspots your phone sees. Go into your wifi settings and see what networks are available. You will see a signal strength indicator next to each wifi network name, and also an icon that indicates whether the network is secured or not. If you tap on any of the networks, the open ones should allow you to connect, and the secured ones will ask you for the password. Your phone can't automatically connect to any secured networks unless it has the password. For any networks that don't require a password, you may still need to tap that network in your wifi list so your phone knows you want to connect to it, and your phone will then connect to it automatically whenever you're nearby, unless you're already connected to a stronger wifi network.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/reginald_bec291de192ca44f

You can connect to wifi by asking your tablet to connect, then pressing connect on the router.
But there is another way, on your table go to wifi and find the entry for your wifi, select it to connect to it and it will ask for password or key. Enter your wifi password.

If your laptop is Still connected to Internet you can use the below ways:

• Windows 7/8: Right click on Wifi connection name>> Select Properties and then check the Show Characters box. Doing this will display the password.
• Windows Vista: Right click on Wifi connection name>>Select either Connect or Disconnect. Then, select Properties, check the box next to Show Characters and retrieve your password.
• Windows XP: You will need to download WirelessKeyView, which is explained in the next section. If your laptop is not connected to Internet:
• You need to reset the Wifi Adapter.

the wifi password is usually on the bottom of the router, often the serial number. If not and your router was supplied by your internet provider then you will need to contact them for the password.

if you need to recover a used wifi key, its not possible from within windows as they are all encrypted when added, you need to search for a wifi key recovery software, there are some that recover and back up keys used on the machine, so i would start there :)

for example
http://www.geckoandfly.com/2009/03/04/wifi-wep-wpa-security-key-password-finder-recovery-and-revealer/