linux / squid / virus removal problem

we have 4 PCs connected to internet via a firewall. The firewall is a linux box using ubuntu and squid Starting 2 days ago there was a noticable band deterioration in all office connections. The adsl provider says that everything is ok on his part. So we suspect that some virus in 1 of the 4 PC is taking most of the band. The coder will inspect squid log files (or do whatever he likes) and find the offending PC. Then he will inspect the offending PC and remove the problem (a virus ?). After the process he will write a small report explaining what he (the coder) did (so that we can repeat the steps if need arise in the future). The coder will be able to log into the linux box and the local PCs using LogMeIn or TeamViewer ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows? (depending on the nature? of the deliverables): a)? For web sites or? other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software? installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform windows xp + linux ubuntu