First off, there are a lot of reasons that you may not be able to access the hard drives.

Can other PCs access other drives on machines connected to the hub?

Can other PCs access drives on the server?

Check how the other PCs login - is there a domain listed in the login screen or a workgroup name?

If there is a domain on the PCs login you will need to configure the laptop to the same domain, and add the laptop to the domain. There is plenty of info on the web - search on joining a microsoft domain.

If other PCs cannot connect to other drives, then remote access to the individual PCs has not been enabled. But if you have access to the domain administrator ID and password you can access what are called "default shares" on each PC. Again, search the web for further info on this - probably the MS site would be best.

Hope this helps - but come back with some further info

Golam