Hard drives (and all other forms of storage and memory) are constantly suffering errors, as a natural result of pushing the physical boundaries of what electrons can do. All drives, optical media, etc feature parity correction that attempts to detect and correct these errors. Parity can fail, though, and it's not always possible to figure out which bit is bad or what to do about it. These problems can be exacerbated by a variety of environmental factors, as well as bugs in the underlying platform. Your hard drive has hardware and software components. So does the motherboard. These can all fail in highly creative, undetectable ways. As a hard drive begins to fail, the uncorrectable error rate can spike, and checking SMARTmay be a good idea. Some file systems, notably ZFS, BtrFS, and ReFS are designed to handle these problems in more robust ways.
Alternatively, any random component (hardware or software) of your system may be malfunctioning, or you may have some type of malware. Good luck finding out what the source of the problem is.
Fraps did not break your computer.