You should have an anti-malware program. There are some really good ones on the web that are free.
So, why did I write this post? A close relative, after describing a really, really slow computer with memory errors, asked for my help. After running an anti-malware program, 350 spying critters were found to be running around in her computer. Not only were they slowing down the computer, they were contributing to bandwidth, which costs extra money when the monthly allowance is depleted.
Due to some glitch with Blogger, I can't comment so I'll answer the question.
I use Malwarebytes and Avast. Both are the free versions, which don't have all of the features or support. Still, they're what I need.
Also, I use Ccleaner to get rid of the garbage Windows accumulates and keep the registry fine tuned.
In Case You've Wondered
My blog is where my wandering thoughts are interspersed with stuff I made up. So, if while reading you find yourself confused about the context, don't feel alone. I get confused, too.
If you're here for the stories, I started another blog: scratchingforchange.blogspot.com
One other thing: sometimes I write words you refuse to use in front of children, or polite company, unless you have a flat tire, or hit your thumb with a hammer.
I don't use them to offend; I use them to embellish.