Hi and welcome Ietsje,
Some modern browsers to tend to hang a bit on first start up, but if it is excessive try clearing your browsing data. Ctrl+Shift+Del
Also try disabling any third party extensions to see if any are causing the issue.
Does it hang opening Dragon or does it open and then hang loading your homepage?
Are you running the same Firewall/Anti-malware on both systems?
Some things to try,
On the problem computer check here and take notice of the final step (Deselect Automatically detect settings if it is selected).
Also temporary disable (Untick) Enable malware domain filtering (Comodo Secure DNS) if you have it enabled. Menu, Settings, Show advanced settings, Under privacy.
A similar problem happens here, on Windows XP, SP3, wireless internet connection, Toshiba Satellite laptop about 9 years old. What I do to get through the unreached home page or other page (usually home page when first opening browser) is click the X at the left of address bar to stop page from trying to load, and enter home page address and click to reload. The page is reached in about 5 seconds. Successive sites also then load comfortably fast also.