I'm a bit of a newbie with PC's from Cambridge, England.
Yesterday I updated my McAfee Security Center as usual on my Dell 1558 laptop which uses windows 7 home premium. This update installed the new version 11 of McAfee Security Centre.
Afterwards I tried using Internet Explorer 9 32-bit and then noticed big problems. I could not load Hotmail login page (just had a white hanging screen) and then spotted that Microsoft Silverlight or Adobe Flash player wasn't working either. My Mozilla Firefox & Internet Explorer 9 64-bit browsers were working fine and completely unaffected!
I restored my laptop to an earlier "restore point" to undo this McAfee update and then Internet Explorer 9 is again working fine.
I would be very grateful for advice on what to do about this.