I've got all those Flash and Acive X ect. plug-ins installed. There's a lot of websites that only work in flash (and require broadband). One prime exaple is http://www.waroftheworlds.com/ It doesn't have a non-flash page, so if you you don't have it, you miss out!
There do seem to be a lot of active x security updates for wimdows, so I can understand your aprehension for installing it.
If you do choose to install anything, then, rather than risking a nasty, get it direct from the source:
http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash
or somewhere reputable like:
http://www.tucows.com/ or http://www.download.com/
Just ensure you do regular scans for viruses and spyware.
I use the free version of Ad-Aware. Available from their site: http://lavasoft.com/
and the free version of Spybot Search & Destroy. http://www.spybot.info/en/index.html
I hope that eases your worry for you.
