I have a Dell D505 Celeron 1.6GHz laptop with 512MBRAM that has been in use for about a year and was working fine. A couple of days ago, I configured it to connect to our office network, exactly the same way I perform it with other PC's of similar brand and specifications. Then suddenly, all files (Word, Excel, PDF) are taking too long (about 1 to 2 minutes) to open. The amazing thing here is that whenever I disconnect it from the network by unplugging the RJ45 cable, all those files simply jump out of the screen whenever I doubleclick the filename. I can see that all files open really fast while stand-alone but just as suddenly, crawls whenever I reconnect the RJ45 port. Also, once opened and then closed, I notice that the files open normally fast the second time. I mean, only during the first time that the files are opened that they exhibit the lag. Hopefully, anybody is welcome to input any help. Thank you.