Is this anything to be concerned about?

My computer was running really sluggish so I ran Malware (found nothing) I ran Avast and found no viruses but there were a few files that could not be read. My computer is still sluggish.

Thanks in advance

https://blog.avast.com/2014/02/28/how-do-i-handle-files-that-avast-cant-scan/

Please (re)search before posting.
Things like this are explained many times already.

I ran Avast and found no viruses but there were a few files that could not be [b]read[/b].
You mean scanned ;) the reason why should be in the Avast scan message

www.tech-faq.com/io-device-error.html