Windows 10: No Signal after Windows 10 Upgrade

I got a K55n-HA8123K laptop for christmas a couple years back. I updated it to Windows 10 a couple months ago and it worked fine. I just had too much junk, so I factory reset. This took me back to Windows 8, so I updated to Windows 10 again. Ever since I used the update tool, the laptop restarted and has had no signal to the tv I'm using, via HDMI. My screen is cracked so I must use a monitor. It isnt a monitor issue because I have the same problem with other monitors. How can I fix this? The laptop is practically unusable. Thanks in advance.

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Low wifi signal strength after Windows 10 update

i upgraded to windows 10 yesterday but after the update wifi signal strength has dropped significantly now i get only THREE bar and some times my wifi does not even detects my router . Before the upgrade to windows 10 i used to get full wifi signal.
I suspect windows 10 is not fully compatible with my wifi adapter please help me out .......

I AM USING Realtek RTL8192EU Wireless LAN 802, 11n USB 2.0 Network Adapter

[Original title: Low wifi signal strength after windows 10 update]

 

Win 10 update

2 days back I upgraded to windows 10 and it seems that the solution is just be with it. Actually after installing, upgrade tries to install itself but unfortunately it requires a confirmation signal. So till then wait.