Problem using ESET Antivirus/Smart Security v5.0.95.0

I have a problem using this, the firewall does not start. It says Personal Firewall initialization failed.
Answer #1
Try this:
http://kb.eset.com/esetkb/index?page=content&id=SOLN2160
Answer #2
This issue is caused by a corrupted Microsoft Windows Registry entry that contains NDIS driver information. As a result, all software installations (including ESET products) that require NDIS drivers will be unsuccessful.
Download the latest version because Smart Security v4.2.54 or newer will not cause this issue
Answer #3
He is using a version way above that one, check the topic title.
Answer #4
uninstall/reinstall eset
ESET Uninstaller Tool
Windows Vista/Home Server/XP/2003 R2/2003/2000
http://download.eset.com/special/ESETUninstaller.exe
Windows 7/2008 R2/2008
http://download.eset.com/special/ESETUninstaller.exe