go to TOOLS, internet options, security,click on trusted sites, then add ebay.co.uk, as a trusted site, it may be worth looking to see which version of IE you are running and what version of Windows , read below.
Pat Altimore, a developer consultant in the Microsoft Services Premier Developer group, posted an
update to his blog last Friday (Jan. 8) which explained that users running older operating systems including Windows 7 and Windows Server 2008 R2 — even if they don't use Internet Explorer, but have it on their computers — need to update to version 11, because without IE 11 installed, some security-based Windows components will not be serviced. Those parts include the rendering engine for JavaScript / HTML, the Web Browser control and Windows' Internet Protocol Handler, and those features aren't included in any system updates that operating systems receive.
In his blog post, Altimore explained how other programs on your computer that access the internet rely on these controllers, handlers and rendering engines to access the internet, so if your PC isn't running Windows 10 and cannot use Edge, it is relying on the technologies included in Internet Explorer. Fortunately, Microsoft makes it easy to get the latest and most secure version of the Web browser, and we've got step-by-step instructions to keep you up to date:
to update IE look here for details.
https://support.microsoft.com/en-us/help/17621/internet-explorer-downloads