Internet disconnects, cant reconnect unless i restart my laptop

[Merijnnnn]

My internet is randomly disconnecting (cable Connection or WiFi). When I try to reconnect it shows no available connections and I have to restart my laptop to be able to reconnect again. IVe already did a clean reinstall (back to factory settings, Windows 8) but it didnt solve the problem. It has nothing to do with my internet or router since the same problem occured When I was at my friends house.. I hope someone can help me fix this problem..

 

[Tmagic650]

Have you applied all the Windows 8.1 updates after doing the factory reset? Are there any yellow (!) in the device manager?

 

[DelJo63]

Usually, some activity you are doing between boot time and the failure is tweeking the DNS settings OR configuring a Proxy.
Of course, a reboot removes it and you're good to go until that activity reoccurs

 

[Merijnnnn]

So it Looks like the disconnects only happens When im playing league of legends.. Does that sound possible? I dont have much ICT knowledge so if theres a solution to stop the dns tweeking or stop the configuration of a proxy by league of legends please tel me!
Thanks for your response so far!

 

[DelJo63]

1. 
   get a command prompt
   
2. you can verify that a proxy is the issue with netsh winhttp show proxy
3. if you get back Direct access (no proxy server), then this is not the issue.

1. you need another cmd prompt with admin rights to change it, so
2. runas /user:administrator cmd (and give the admin password)
3. enter: netsh winhttp reset proxy