Upgrade to Windows 10 for free : https://www.howtogeek.com/265409/you-can-still-get-windows-10-for-free-from-microsofts-accessibility-site/
And then get the complete MS Office for £2.04p, approved by and downloaded from Microsoft :
http://www.ebay.co.uk/itm/ORIGINAL-OFFICE-PROFESSIONAL-PLUS-2016-32-64BIT-LICENSE-KEY-SCRAP-PC/192273410948?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649