no internet after downloading lag switch

[LucidityyMC]

I downloaded a lag switch the other day and since its use only my pc cannot connect to the internet? was it a virus?

 

[rgd1101]

or a malware. uninstall it if it doesn't work

 

[LucidityyMC]

already done, i have internet back somehow but i cant use ethernet

 

[rgd1101]

How are you connecting to the internet? wifi?