You cand find it (compressed: sysdm.cp_) in your windows installation cd under the i386 directory. Just expand it to %systemroot%\system32. And welcome to THE forums!
And to take care of the cooling, shove the whole thing in the freezer (preferrably a professional one!) * MSFN is not responsible for any damages, directly or indirectly.
Hello and welcome to THE forums! Now to your issue: do you have installed Ace Mega Codecs Pack or K-lite Codec Pack? If so, your best bet is to reinstall Windows Vista (yes, again!) then install Shark007's Vista Codec or ffdshow.
Is your computer part of a network with a domain? If so, do what you`re told, contact the network administrator as there may be a group policy enforcement that denies your access to WMC.
Hello and welcome to THE forums! Get rid of your Norton using SymNRT then get either a free antivirus or a better paid one. Norton products are resource hungry and slow down the machines they are installed onto.
You seem to have issues with your machine whilst playing (even old) games. I would save up some money and put together a new one (or even look through companies' old computers when they are replacing them with new ones).
Could be as it (most probably) registers kernel-mode drivers. What happens if you uninstall it (assuming it unloads the drivers correctly too), or better still if you don't install it at all?