Hello all, my computer has been freezing badly for a few weeks already. The freeze is random from bootup to windows inside. However, my computer has gotten worse but im fixing it now(long story ill skip ) , now problem is it is very annoying it frequentsly freeze up at boot up screen too when im trying to fix 'invalid system disk' , i suspect my HDD is infected by virus since my sys files are missing.Can you guys inquiry that my computer is infected?
Currently using antivirus:AVG 8.5 , used for 2 years already, useless antivirus?