When most people’s computers start to run slow they do one of two things: download some scam program that makes the computer slower or they completely buy a new computer. Well don’t be that guy who freaks out and buys a new computer, unless you have enough money to buy new computers without making a dent in your bank account.
Here is all you have to do and it takes about 20 minutes. It is called a “System Restore”, a system restore uses restore points to return your system files and settings to an earlier point in time without affecting personal files. Restore points are created automatically every week, and just before significant system events, such as the installation of a program or device drive(http://windows.microsoft.com/en-us/windows/system-restore-faq#1TC=windows-7). It will help speed up your computer and delete anything bad you downloaded.
Here are a couple how-to guides you can use: https://www.youtube.com/watch?v=nFY3Bf9HQmM
https://www.youtube.com/watch?v=jZbZZosXpYg (for Windows 8)
https://www.youtube.com/watch?v=K37n5Ymprkw (for Mac)
So don’t freak out and buy a new computer, try using these links to help you restore your computer. Your computer should be running faster in no time. I hope this helped.