I've just got my laptop back from having a new hard drive put in and now it seems I can't click on anything/ do any form searches (e.g. my local library) without: gip.driverdiv.net and Ads by PassShow Popups everywhere, including in the bottom right corner of my (MozillaFirefox) browser, about "interstitial information"
My very first act on booting the computer again was to run Live Update (Nirton/Symantec), and I've done a full system scan (Norton/ Symantec), cleared my browser's cache, deleted cookies, etc.
The local company which replaced the hard drive was recommended, too...
My apologies for not having come back sooner. I discovered that it was an add-on to my browser (Mozilla Firefox), which DS had probably installed by accident, when he took my laptop to "work" with Daddy on Christmas Eve.
This page was how I removed it: disabling the add-on in Firefox, and then uninstalling it.
I was so relieved it was as open as that, especially after my NOrton/Symantec failed to detect anything!