I’ve been having troubles with defragsvc slowing down a copy of Windows 10 hosted on VMware Esxi.  It was putting the hard disk at 100% usage which caused major lag for all the other computers trying to access the VM.  I changed the settings so that the defrag only happens once a month but it wouldn’t stop this existing defrag.

Then again, was it really defragging?  The numbers showed 0% fragmented yet the defrag kept running?  I tried to stop the service but it wouldn’t let me.  I tried it via the commandline and it said it wasn’t running.  Thought that was weird.  Eventually I found some information on how to permanently stop it at windowssvc.com.

Open a command prompt. (Run a command prompt as Administrator in Windows vista/7/8)
Copy red command line and Paste.
sc stop “defragsvc”
sc config “defragsvc” start= disabled

I look forward to seeing if this stays disabled or if it improves my server.  Solutionreach was also maxing my drive and I just can’t figure out why.  It only happens on Wednesdays and I don’t see anything in the settings that sets Wednesday apart from any other day.  I disabled it and later is when defragsvc started to cause issues.  This is all happening on just one computer.  I haven’t run into this issue anywhere else.