My girlfriend's computer was dying, would freeze up and operate extreme slow. Complained that she wanted a new pc. So I bought her a NZXT H1 Mini. When her new computer came, I was able to take apart her old NUC and troubleshoot. Sure enough during testing the computer started to lag terribly. Had the cover off and noticed that the cooling fan wasn't spinning. System must be thermal throttling to save the CPU. So gave the fan a flick with my fingernail and it started spinning again. And the lag gone. Looked into replace cooling fans and found this shop. Even though it wasn't fastest shipping, it came reasonably quickly. So took off the old one cooling fan and put the new one on. I put some new electric tape. And it's back to life! I'm so thrilled!