It wouldn't wake up one day. Was working fine the day before. So I held the power button down until it shut off, turned it back on and it took forever, like 7 hours to boot back up. The screen said it was reparing disk errors. So it is working again but is super slow, really super slow. I'm thinking the hard drive failed as I don't hear it wirring anymore.
I'm far from an expert, but maybe malware? You can try ccleaner.com There's a free version and it COULD fix it. I've use that several times over the years, after our IT guy recommended it as a very trustworthy tool.
