Hi, before I install Hijackthis, I want to know if USB transmission from PC to PC is safe? I mean, I don't want to get that Trojan on my USB. Alright, umm, my mom was using the PC and Norton Security Center did not turn on automatically. So, the PC just 1/3 of a times keeps showing me blank desktop on log-in. In her XP account, it's impossible to work, it seems the processor got retarded, takes 5 mins of waiting for processor to start anything. However, in my account it works better. Yesterday I scanned my Windows folder with NAV and got 1 trojan. However, I cannot run NAV because it says "Norton Antivirus has Encountered a Problem That Needs To Close". It was something related to kernel.32. Help? What Antivirus should I get? And is there a free registry cleaner? Thanks in advance.