Just went in and changed RAM and CMOS battery now it says my windows 8.1 Enterprise 90 day evaluation is expired....
OK - so then it seems to have reset - but it put in a trusted time of 2014-12-19 08:58:43 - about a month ahead of NOW NOW [as they say in South Africa]
HELP PLEASE - I'd be happy to get my 30 days back - Thanks Keith