Hi,
I recently purchased a laptop (2 core duo, 1 GB ram) with Vista. Over the last week or so I have noticed suspicious behaviour with the CPU, Memory and Disk activity spiking and maxing out. It even affects mouse behaviour causing jumpy mouse (optical) movement.
In the Resource manager you can see the spikes with just one Firefox instance running with two tabs.
I have scanned the computer with StopZilla, and AVG (free edition) and while I did find several Trojans initially, it now scans clean.
Before I give up and reformat with Ubuntu, is there anything I should check for?