Random Text Popups?

So earlier today I started getting odd popup text similar to when you keep your mouse over a selected program for a few seconds wherever I keep my cursor, with text such as “Fall Styles”, “Omnichannel”, “Real-time”, ect. while browsing, in fullscreen games, and while watching videos. I haven’t opened any spam, or gone to any suspicious websites. What virus could be causing this? I haven’t found anything matching this on the web, nor has avast found anything in either full scan or boot scan.

Attach your basic diagnostic logs. (MBAM, FRST and aswMBR)
Instructions: https://forum.avast.com/index.php?topic=53253

So, I downloaded Malwarebytes Anti-malware to run the tests, and it found it. It was registered as a trojan.spambot file, among other unwanted programs that avast happened to miss in both its boot scan and full system scan. Once it quarantined it, the lines of text stopped, so thank you for giving me a link to a decent antivirus.

Ermm, you’re welcome.

Although it has stopped, it doesn’t mean your system is clean now.
I strongly suggest to provide the log files so we can have a look at them.