Hi, this is my first visit, so a little nervous, but Hi everyone. My computer (Win10, HP Envy notebook, Intel i5-6260U@1.8GHz Memory 8GB Malwarebytes Premium Kaspersky Total Security) was working just fine until a short while ago. Suddenly it started to take ages to open Firefox and ages to load some pages (not all). Also, another program I use Ots Studio also started to take several minutes to open, wheras previously it was virtualy instantaneous. I need some help urgently as the machine is almost unusable. I have scanned with both Kaspersky Premium and Malwarebytes, but both scans returned 'no threats found'. Where do I go next please? I should have added that this first happened sometime ago and after muddling through several websites I reset the Kaspersky/Firefox certificate and everything resumed working properly again. This may have been more luck than judgement. Unfortunately I cannot remember exactly what I did to recover the situation. As the problem has reocurred I want to find a more permanent solution. I should also have said that the computer takes ages to load, it gets to the Win10 sign in screen OK but after I have entered my password the screens (I use the laptop screen and an additional screen) go blank and then about 2 to 3 minutes to open. My computer has an SSD for the Windows 10 system etc. S PS Please note that because my computer is so slow I am posting this using a different computer.