Dll file missing!!

Point value changed by question poster.

You may already have a virus if you have the complete install and it is trying to keep you from installing. Download the latest Stinger and scan all fixed drives and memory. You can find Stinger.exe at:
http://vil.nai.com/vil/stinger/

Next look at McAfee's Solution ID: nai9746 for further help.

The way I would fix it. Is I would reformatt and reinstall everything and that should replace everything back like it was when you bought your computer and you should be good to go.
Make sure you save your stuff on a floopy before you do that are you will lose it all.
Jack.

You can do one of two thing. First option easy, second option a little more complicated. You can go ahead and try to reinstall over the existing first botched installation of McCafree and it may work just fine, OR the preferable thing would be to do a clean install of the McAfree which would mean to take out any traces of the botched one in add/remove program. Now, depending on what version of windows you are running (lets assume XP or ME), you should turn off system restore while you are doing all of this because if you don't, then that sneaky trojan or virus will hide in your system restore files. Then you need to download a free/trial adware/spyware program (I like spy seeker but they all work pretty good) and while you are there, then d/l an antivirus/antitrojan cleaner as well. And heck, while you are at it, go ahead and shoot for the moon and download a registry cleaner as well. Now these are all trial programs but they will work for free for a while, long enough to get you up and running. Now that you have your computer all squeeky clean of all bad things hopefully, you should be able to go ahead and install your McAfree with no problem (assuming you have the room on your hard disk and if you are running regular maintence then you should have all kinds of room!) Oh, and don't forget to turn system restore back on! Hope that helps!

Are you sure you even want to continue? I have never had a pleasant experience with McAfee. Especially trying to uninstall it, it WON'T go away...

There are other companies out there, doing a better job, for way less money (one client of mine was being charged $50 per month for "on-going" MacAfee support..... wtf?) It took me 3 hours on the phone to stop that !!

IMHO it's a very intrusive and difficult software to work with, and it doesn't "play nice with others".....