Nothing is obvious to me. Maybe someone else could have a look? BUT....
Make a new folder in C: alongside your Program Files folder. Either download and save HijackThis to this new folder, move it there, or extract it to it if you have the zip file version.
Run a scan and set the following to be fixed:
-O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
...[it's a timewaster..]
-this next one locks you into the orange website as a home page. If u fix this item then you will have a choice of homepages.
O14 - IERESET.INF: START_PAGE_URL=http://www.orange.co.uk
Post a new log here. Be sure to close all applications and windows when you run HT.