How can I copy text from a web page where it been has disabled?

In Chrome or any of the popular modern browsers, open Developer Tools by clicking F12 and then click on the magnifying glass icon (or equivalent icon in other browsers) to turn on inspect mode. Move to the content within the web page and point to the specific portion of text that you want to copy. The HTML code corresponding to the pointed area will appear in the docked Dev Tools window. Double click on the HTML code to copy the content you need.

Alternatively, you can save the page as a text file in Internet Explorer and then you can get just the text within the web page in the text file. In IE, choose File > Save As and in the dialog box that opens up, specify the Save as type as Text file.

If you're worried about disputes with the provider, then a simple text log might not be very good evidence. Unless there's some way to verify the text was actually from the website chat you claim it did, they could easily argue that it's not real.

You might want to use screenshots instead. Simply hit the "Print Screen" key on your keyboard and then open a graphics program like MSPAINT and paste. You can also use a word processing program like Microsoft Word or even WORDPAD that still comes with Windows and paste it in there.

If there's more text than fits on one screen, do it in steps and take more screenshots. One good thing with the screenshots is that you'll have the full image of the webpage showing the text of the support chat is really coming from their website and representative.