msn mcafee antivirus download freeI got a virus now IE8, Mozilla firefox and MSN won't work?

Ok so i got a trojan horse virus named like crypted for mike.exe or something anyway it took over my mcAfee and wouldn't let me scan anything and so I went to my other working PC and downloaded AVG antivirus free version that found 7 trojans and said it had deleted them but now my IE8 won't work when you click on it the browser will open but just keep loading and never open the page I left it for like 10 minutes and it still said loading. So I got mozilla when u click on that the hour glass come up and in task manager it says under processes that mozila is opened but no page loads up or anything then the process quickly closes this is the same exact problem as My msn. and so i downloaded google chrome and for some strange rmsn mcafee antivirus download freeeason it is working fine but still all the other programs I described arnt please help me.

what i have tried
-reinstalling IE8
-AVG virus scan multiple times
Here's your REAL problem:

You installed AVG, but didn't Un-install McAfee FIRST.

You can only run ONE A/V on your PC at a time.

So, un-install McAffee, and reboot your PC, then install and run AVG.

TIP: That's a lot of Trojans, if AVG can't fix it, you will have to do a Clean Install of Windows, after backing up all your personal data. This is 100% guaranteed to work.
Your internet connection settings are messed up. Check your hosts file and proxy under internet connections.
First turn off System Restore.
Download, install and update Malwarebytes. Then msn mcafee antivirus download freerun a full scan in Safe Mode.

then delete all System Restore points and create a new one when you are sure the malware is removed.
If you have cable internet restart the PC and tap the F8 key until you get to the Utility Menu. Highlight Safe Mode With Networking with the arrow keys and press Enter. This will let you get on the internet to download and update it. You must be wired into the modem or router, wireless won't connect in Safe Mode With Networking. If you have DSL it won't be able to access the internet in this mode.

You can also download Malwarebytes to a flash drive, install it on the drive and update it then plug it in to the infected PC to run the scan.