One of the major downsides of the MoUSO Core Worker Process running on your PC is that it prevents computers from sleeping. Thus, each time you take a break from work on PC, you will either be required to shut it down or keep it awake. In the short term, this may not be a problem. However, in the long-term, this can cause your PC to run into major issues like low performance, fan noise, overheating issues, high disk usage, low storage capacity, quick battery drainage, and whatnot! Checkout some true and tried mechanisms to fix MoUSOCoreWorker.exe preventing sleep error.