Had a computer in system go down and to enable student to finish his work installed windows 98 computer in his room. This was installed with the help of NTL technical on a direct line, not through router as NTL will not support network. Requirement for old computer finished and system reconnected but network will not function. It would appear that we have lost Internet Explorer on all computers, except one that was not reconnected to network. Broadband system working to one computer but when try to connect to network it will not function. Router being used is a Linksys BEFSR41 please help as students need their connection. We are not a college, just a host family to international students. Is it not possible to run two different operating systems on a network?