Here's a full list of instructions:
https://malwaretips.com/blogs/dllhost-exe-32-com-surrogate-removal/
They include using a program that I'm unfamiliar with (ESET Poweliks Cleaner) but, as Malwaretips.com is a highly-respected source of reliable information, I'd have no worries about downloading and running it.
However Malwaretips.com does sometimes go for a bit of 'overkill' in its instructions and my own instinct would be to try simply running the free version of Malewarebytes Anti-Malware (which is included in those instructions) on its own first. If you've not already got it, you can download it from here:
https://www.malwarebytes.org/antimalware/
(NB: At the end of the installation process you'll encounter a pre-ticked box offering you a free trial of the 'Premium' version. Click to remove that tick before proceeding!)