Yes, that's Orthos. In "normal" MB BIOS's you can view the current temps of a few components, usually CPU, PWM and "SYS". However, Dell tends to disable such features so as not to confuse the users. You might try running PC Wizard 2007 (another nice free utility) which reports all kinds of useful info and may be able to report temp info for your system. For GPU temp, though, you normally need a utility tailored to the specific graphics card you have.
However, your disk check concerns me. First, the file was a saved earlier-version system library (dll) file from system restore point 8, which likely means that that saved restore point is at least slightly corrupted. Perhaps it's just a fluke, but I would run a proper low-level disk diagnostic program (after backing up any important data in case the diagnostic pushes an ailing hard disk over the cliff of death). The different hard disk manufacturers each have their own free software for this. You may be able to find the name of the hard drive manufacturer and the drive model in the BIOS, but it should be available in PC Wizard 2007 as well.
Then, go to the correct manufacturer's website and download the diagnostic program, and run it according to the instructions. If it passes that, it's unlikely to be a disk drive hardware problem.