Need anti-virus for lab with no Internet

any antivirus will need the internet to update it's virus lists regularly - so without internet, you would need to download these yourself, and install them on the lab PC - which seems not practical to me
the most practical suggestion is from Thomas imo

ok well this is for a school and i think students store their documents on it.....

unless i tell them to store the documents on a flash drive

is there any free alternative to deep freeze??? cause i doubt they will purchase the software.....

There is a windows 7 compatible version of steadystate. Check the ms site. There is also a way to get steadystate working for 7 (I used both alternatives for a while)

These computers still running Vista

should work

Windows 7 solutions generally work on Vista.

I read that steadystate is no longer available