Question what is causing my new keyboard to work erraric

[Novel8]

A few months ago i had to buy another keyboard for my win 7 desktop. It was the Logitech type. At times it seem to work normally, but lately i find myself retyping some words that i know for sure that i entered it correctly. I have been typing for over 30 years. as an example i would start a sentance and reread what i typed and noticed the word 'and' was interspersed a few times and i did not even typed it. I don't kow how to correct this and although you will not see the 'mistakes' i made in this post cause i edited it. Any ideas what is going on here? I have used other keyboards in the past but they all acted normally. Is there something in the software that i need to check out and if so, what?

 

[Nine Layer Nige]

Is it a wireless keyboard ? ( out of range ?)
Does the problem occur in all software that you type into or is it isolated to a word processing package such as MS Word ?
Make/model would help community.

 

[Novel8]

Is it a wireless keyboard ? ( out of range ?)
Does the problem occur in all software that you type into or is it isolated to a word processing package such as MS Word ?
Make/model would help community.

No. its usb connected and i do not even use word processor , just response to emails and at times asking support, such as here. or other Forum sites.