I already that, just tried it again though and still no change, I can uninstal fine but installing doesn't seem to work on IE, works fine on Firefox though so it is the same as before

Very odd.  I've seen this specific problem a number of times and running the (downloaded) uninstaller and reinstalling as per instructions has corrected the issue in every instance.  As an afterthought, might try a reboot between the uninstall and reinstall.

Ben_Robson, I feel your pain.I have tried everything in macromedias KB a dozen times over. Searched every forum and tried all suggestions with no joy.I go a month or two and try all over again to no avail.I just use Fire Fox.Some suggestions not in this thread are, if you have spyware blaster make sure the kill flash box is not checked.Zone alarm pro also has a kill bit for flash and if you revert to Za free version the kill bit stays.I also had giant-anti spyware from microsoft at one time and there was also a way to kill flash in there.With me Flash shows up as installed but just will not work.Also if you have dialup with an accelerator I think this messes up flash altogether. Happy hunting.Lee