Unable to install anything at all

I have windows vista Home Premium 32BIT

I just went through all of the antivirus/malware fix its.

I am unable to update Java.(Installer cannot Proceed with the current Int. connection settings)

I can't install BitDefender (Requires Internet connection-no internet connection) I do have internet connection

Can't run AVG remover ("save file" not highlighted)

When I try to open certain emails i.e.-Phantoms and Monsters- a message comes up that says, (One or more ActiveX .... could not be displayed.)
1.security settings
2. Blocked publisher

Another message, JavaScript has stopped running

Can't install BitDefender-It is between download application files and install files... then it stops and says it can't go any further.

I am without antivirus protection. Please help!!!

 

Have you tried the following from command prompt?

Code:

ipconfig /flushdns
msiexec.exe /unregister
msiexec.exe /regserver
regsvr32 /s msi.dll
net start "windows firewall/internet connection sharing (ics)"

Are you using any kind of proxy?
Have you tried resetting your IE settings to defaults?
Have you tried completely uninstalling and reinstalling Java?