You Could move the virtual memory (page file) to an alternative drive if that hasn't been carried out.
Or use software to resize the partition, but personnaly i would be careful using that option.
As for p2p networks, you would be surprised at how many authorities still have p2p for their Admin networks.
Capita support approx. 180 schools in the northwest who are p2p, so in essence, each pc will need a visit to install the Solus3 agent before the Solus ui will pick them up, Capita then advise to use Solus 3 to deploy .Net4.
I am advising their Technical staff to start the installs now for .net 4, giving schools a bigger window to deploy Solus3.
Solus 2 will still be around for at least another year if not longer.