Press and hold down the Windows key and press the R key. Type in MSCONFIG and hit enter. Click the Startup tab. You can uncheck anything there except your antivirus program. I would leave the hardware related things there. I recommend only unchecking 2 or 3 things at a time then rebooting to see if you get the desired result. You can repeat the process if need be. Just be sure to remember what you uncheck in case you need/want to get something back.

Good luck.