I found many dell laptops has this problem, it is caused by slow system In most instances. I suggest that you can use the Advanced SystemCare or Tuneup Utilities to optimize your system.
Outdated drivers may effect your PC performance, if you want to update them, the following software maybe helpful. Free: Driver Booster Drivermax SlimDrivers Free Driver Scout DriverPack Solution Paid: Driver Reviver Driver Navigator Driver Checker