After you’ve had your computer for a while, and have visited a lot of websites, you are (unfortunately) bound to have malware on your system, which can both slow it down, and invade your privacy. Malwarebytes’ Anti-Malware is the most effective anti-malware utility I have ever used!
Let’s start by downloading it from here. Click the (blue) download free version button on the left, and follow the prompts. Then, run the program, and follow all the prompts to install the program.
On finishing installation, be sure to select to Update & Launch the program, as there are almost definitely going to be updates available! After a minute or two, it should be up and running, and ready for scanning:
You then have the option of running a quick, or full scan. The quick normally picks up most malware, but, as the full scans your whole system, it’d find everything. If you scan regularly, and don’t have a lot of time, then you could do a quick every time, but, if you do it rarely or occasionally, you should definitely do a full scan. While scanning, you’ll see the “scan in progress” status screen:
Once that’s done, you’ll see a message reporting its findings. After that, you’ll see a list of infected files, and then have the option to leave, quarantine, or delete them. After that, Malwarebytes’ will bring up a log, showing you what it is done, and you can save it for diagnostics.
After restarting (if it asks), you should hopefully see a much cleaner, and hopefully faster system than you used to – good luck!