What are Temp2, Temp3, ad HD0?
I assume HD0 is the HDD or SSD for your OS and if that's the case, is it an SSD or HDD? I've never actually seen a hard drive overheat.
Also, what are the percentages related to HD1 and HD0? If that's usage, you must have something running through each file at the time of scan/overheat. The only things that usually do that are things that are scanning those drives.
I assume Core is your CPU and if Temp1 and Temp2 are related to that, that's understandable. If that's the case, then your CPU seems to be overheating. If it's not due to overclocking, your cooler isn't getting the job done.
What kind of CPU cooler are you using?