So I recently built my first gaming PC about a week ago. For the first few days,it was running like a dream. Now it's been slower than my last computer, which had very old parts. My specs are: AMD FX 8320, EVGA GTX 960 SC, G.Skill Ripjaws X Series 1x8 GB, my old HDD and my old PSU, and the ASRock 980DE3/U3S3. I've already tried Avast, Malwarebytes, SlimCleaner, and Iobit Advanced Systemcare and there's no viruses or malware and my drivers are up to date.