The Flash player is necessary for many of those pop-up ads and graphics on the internet, particularly on many of Yahoo!'s webpages. To prevent these annoyances from appearing, do the following:
1. Ensure Internet Explorer is closed.
2. Determine your path to the flash plug-in (the plug-in will be a file whose name contains the word 'flash', and the extension .ocx) For most installations, it will be C:\Windows\system32\Macromed\Flash\swflash.ocx.
2. Unregister the plug-in by typing the following at the Start|Run prompt:
regsvr32 c:\Windows\system32\Macromed\Flash\swflash.ocx /u
When you restart IE, most (if not all) of those pop-ups should cease to bother you.
Note: Also remember that if you disable the flash plugin you will not be able to view any sites that primarily use flash for their site design.