Disk Read Error problem (steam version)

Hi, was quitting GMod last nigth when my antivirus program (AVG) saw Gmod as a threat, it havent happened before but i was tired so i turned off my computer, then today i was going to start GMod and it says :an error occured while updating Garry`s Mod (disk read error). i tried reinstalling but it doesnt work, i also tried confirming the game but it still doesnt work, can someone help please?

Add whatever .exe/.dll that was “detected” to the exclusion list on AVG

Thank you! it worked :smiley: