As long as the extension cord meets standard electrical specs in YOUR country then nothing to worry about. All AC power points in your house use extension cords anyway UNLESS you plug your cord directly to a generator.
Hope this makes sense.
BH *** **Click the KUDOS thumb up on the left to say 'Thanks'** Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.
Be alert for scammers posting fake support phone numbers and/or email addresses on the community. If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".