plz gime a guide to install ESF im dieing plz just write it down casue i get a few errors and soemtimes its corrupted :shocked: 
If you have a corrupted error than it’s your installer. Download a new installer.
I believe the HL2files mirror is good.
the first time i downloaded ESF it was great but my bro deleted it it worked form the hl2 files tho ur right but it says now that i got an invalid key
If you have an invalid CD-Key that is a Steam problem.
[size=1]Are you sure you logged into that old Steam account you used before your bro deleted ESF? If you made another account and registered HL again, it won’t work, because the key is already registered to your old account.
If you didn’t make a new account, then maybe your bro did something to your account? I dunno.
Unfortunately, there is always the possibility of someone stealing your key. Did you loan HL to someone?[/size]