gehe zu cmd ( Administrator:Command Prompt ) und type genau unter text :
netsh int ip reset C:\logreset.txt
ipconfig /release
ipconfig /flushdns
ipconfig /renew
ipconfig /flushdns
nbtstat –r
netsh int ip reset
netsh winsock reset
netsh int tcp set heuristics disabled
netsh int tcp set global autotuninglevel=disabled
netsh int tcp set global rss=enabled