I tried deleting the local restore points and created a new one,it freed upto 10gbs and the drive was back to almost normal.But,now it started fluctuating again,like somedays 143gb and other days 150gb.Moreover, days ago, my laptop was showing booting issues with automatic repair showing up several times,finally i went into safe mode and restarted the lap and it booted normally but not that efficiently.Do these factors contribute to the c drive filling up?and Just a genuine question, is farbar as efficient in finding virus infection as finding out malware infections(passing on an opinion to a friend).