Vista - Problem connecting to my network drives

Hi can anyone help me with my problem connecting to my network drives?

I am unable to connect to any network drives and printers. I used to be able to connect to them. One fine day, all of it stopped working. I even tried to map my own local drive it was still unsuccessful. Whenever i tried to MAP a drive it will prompt me the log on. How do i remove it and connect to the drives per normal?

I know all my password and i did not set any password. i also tried to remove my Norton 360 v2 on my 3 computer totally but still same issue.

I have 3 machine. XP Home sp3, XP Home sp3, Vista Home premium sp1 32 bit.

I only had problem connecting my Vista to any of my XP computer. From XP to XP i had no problem sharing.

I do not have any problem accessing the internet.

I also realize that when this problem started, i was unable to connect to my router console through IE using my vista machine.

In Vista i was able to ping all my Computer via their hostnames & ip.

My workgroup was also set correctly.