To get that, I had opened Avast Free Antivirus, clicked on Run Smart Scan, it says No Browser Threats Found so I click on Next, it says No Malware Found so I click on Next, it says I have 3 Advanced Issues Found, I click on Skip For Now, then Skip (as otherwise it tries to sell me a paid service), it then says Scan Finished and I click Done.
Then it says Your PC is getting slower and I click Show Me. it then gives a list of supposed problems, I click on PC Health Problems and the screenshot appears.