There are a number of reasons why your system can slow down. Probably the fastest and simplest way by which you can solve this is by rebooting your system first.

A number of people actually use their PC 24/7 and put them in sleep or hibernation mode instead of shutting them down completely. A simple reboot in this case can also clean out these so-called temporary cobwebs, if you will.

If you have rebooted and your system continues to run slow, then the next step would be to ask yourself what was changed recently, when it comes to your PC.

If there was a new program or hardware installed or even the driver was updated, it would be a good idea to undo what you just did.

For uninstalling a program, you can use the Programs and Features tool in Control Panel while selecting the Roll Back Driver option in the Drivers tab found in Device Manager. Similarly for new hardware that has been added, go to Device Manager and right-click it and select Uninstall to complete the process.

Of course, if none of these actions has influenced the speed of your system then it is time to check whether an overly large memory is taking up a lot of resources from the CPU or memory.

Open Task Manager and look at the Processes tab which contains both the CPU and Memory columns. You should be able to find a program that is taking up resources and close it in Task Manager itself.

Of course, this is only a temporary fix and one must uninstall the program next and so to ensure that your system doesn’t slow down the next time around.

Finally, while malware might rarely cause your system to slow down and for this you can use software that searches for malware so as to resolve the problem.