Thanks for your suggestions but that was not the answer--This laptop(and most newer laptops with built-in wireless adaptors) has never had a problem communicating with both wired and wireless routers --I did however find the solution to my problem and wanted to share it with anyone eles running into the same issues--The problem is a software issue and not a hardware issue--I have been running utorrent(P2P software) and after looking into their site FAQ's it seems too many global connections will cause problems with some routers--the link to this info is: www.utorrent.com/faq.php with P2P---I have uninstalled utorrent and now all is well--Thanks for everyone's help---
I have a 3 computer network successfully sharing files and printers. 2 of the computers are Dell Desktops running Windows XP and the 3rd is my Dell LapTop  Studio 1745 running Windows 7. I am connected by ethernet on all 3 using a modum and router although occassionally my Laptop connects wirelessly when I am travelling. However, the issues are the same wired or wireless. Whenever my Laptop has to reboot or restart-- the network connection is lost on ONLY the laptop--Both the desktops are unaffected--both the desktops can still share printers and internet ONLY the laptop is down. The solution is to have to reboot both the modum and the router and then all is in order but that solution is simply a quick fix. Something must be wrong. I have downloaded the most current drivers and have checked the router and modum--all are in perfect condition and it seems that others that have had this problem seem to feel that the issue is with the laptop--Perhaps the fact that the laptop is windows 7 and the others are XP is an issue, although if that were a problem why would I have a perfect network at all times other than when a reboot or restart is in order--When I have rebooted or restarted the desktops--all is OK--Only when this Laptop is rebooted do I Iose the network connection. Please advise and thanks in advance--Perhaps I'm simply missing an easy solution. RobertPaul
Network Drops on every ReStart/ReBoot on this computer