I found something that worked for me. Been stuck with this laptop for 2 years (but never used it as it was a personal laptop) * Shut down laptop* During restart tap F2* In Bios setup -> Untick Intel Step Speed option (can't remember which category it shown under but I think it was performance)* Exit* Machine will restart and work fine after that like we expect it to. Note: When I was researching, this fix had a disclaimer, it may affect battery life as this option is ticked by default to preserve battery. However, it was a no brainer for me to at least use the laptop than save battery. Hope this helps.   You may also use the "Get Help Now" option at the bottom right to chat with a Dell technician right away. [IMAGE]  
This laptop is frustrating the    Code of Conduct  policy which you agreed to when joining. DELL-Admin>  out of me, it isn't even 5 months old I paid $1200 for this which I think is a pretty expensive price for a laptop that runs slower than the one I was replacing (8yr old Toshiba Satellite). This morning it took exactly 9 minutes and 48 seconds from when I pressed the power button to when I was able top open up "This PC". I did some research and watched the "How to Speed Up Your Computer" video from Dell Tech Support on youtube but everything they said to select in power option's like sleep, fast start up etc. was already selected on my laptop. At this point I was ready to drive a sledge hammer through it but luckily I seen that there is a Support Assist App I can run to solve any issues so I thought "you beauty this will fix everything" well not quite, I opened the Supports Assist App and hit run all it soon scanned for Drivers and Downloads and said there is an update available then it scanned the hardware which was completed so it moved on to "Preparing for clean files" which it has been sitting on 0% for about 8 hours.I have had a virus protection (McAfee recommended by Dell) since day one so I doubt its a virus, I'm running out of patience and alcohol can somebody please point me in the right direction. 
Dell Inspiron 15 3000 Running Extremely Slow