Vista - Major Problems with Laptop (Vista)

Hi

I am having multiple problems with my laptop. I have a Toshiba pre-installed with Vista.

All of a sudden, yesterday, the internet on the laptop stopped working. I have a desktop computer as well, and the internet on the other computer was working fine.

The internet wireless icon appears fine, as if it should be connected to the internet.

Anytime I re-started my computer, the following error message pops up from Microsoft Windows:

Host Process for Windows Services Stopped Working and was Closed.

Then, I get a pop up from Norton Anti-Virus, saying:

Auto-Protect Experienced an Unexpected Error, 0x000003E8

Everything freezes and I can't even shut down the computer and have to wait for the battery to drain.

I also get the message:

DHCP Failed

I have tried re-starting it in 'Safe Mode with Networking'. Yesterday, in this mode, the Internet was working, but today it is not working at all.

I am at a loss as to what to do. The problem is on the laptop only. I have searched online on my desktop computer and this could be a malware/virus destroying my laptop ... but I don't know how to get rid of it when I have no internet access to download software which can search and destroy it.

I downloaded MalwareBytes onto my desktop and tried transferring onto my laptop. It works fine on the desktop but will not function on the laptop.

I went into the Event Log on the laptop to see what exactly happened, and it says it is not functioning.

Can anybody help me please?