Hi, Yesterday I was using Defraggler from piriform to do a defrag, and I suddenly got a Disk Health: bad, and checked SMART, and all was 0, all SMART attributes was with error and bad, temperature was 0º (of course incorrect) a new disk with about 1 year and half, then I canceled the defrag and only have done a chkdsk (just chkdsk) on restart, then it took too much time, but at this time when I opened Defraggler, and I checked the Disk Health: good, also all SMART attributes was right. It was a bug? I think so because I was running Norton 360 Scheduled malware search and Defraggler simultaneously. Then I put the WD diagnostic tool running, and done a quick test and extended test and I got all tests OK and passed. Well, I let you 7 screenshots and please analyze this and say me if all is ok, and if all SMART attributes are there and OK or is someone attribute missing, or I should take it to warranty. Defraggler: http://gyazo.com/78937a5bc2f33ecc6ffb120cf58918ac.png http://gyazo.com/2d5edfd7ecd060ebb389ecc533787733.png Speccy: http://gyazo.com/8c53fc81cf0dde9248f3fe822b2b68ff.png http://gyazo.com/58ac447cdba7f2a045d24cccf1cfaf6e.png WD Diagnost tool: http://gyazo.com/97808d7c7dd9581129a089eefbcd2426.png HD Sentinel: http://gyazo.com/66148ffd5a76e07f5fb2dee84bf4e42c.png http://gyazo.com/6c751bf0385fbe4a987be3e50e4a776a.png Thank you.