CIS updater seems to be blocking itself

Problem - cannot download any updates for my basic CIS (using windows xp - normally use Ubuntu linux in case im overlooking something really obvious!)
flags up on XP - Comodo updates available - click on it - nothing happens
go into CIS manually – updater gets to 3% then internet connection is terminated -
doesnt say by what - tells me to check my internet connection (which is fine)
assuming CISs is stopping itself updating somehow - do i need to add it onto its own safe list? or a complete re-install??

What version are you using? Any version older than 3.12 cannot be updated anymore.

You will have to start with a clean install.