Network & Network Mapping Problems?

Mapped Network Drive Timing Out?

Just upgraded to Windows 8 Professional from Windows 7, and I love everything except the networking.

Nothing works except wifi. I can't see any other computers on my network or any of the hard drives connected to my router. My other laptops in the house can see them (one runs Windows 7 and one is a Mac).

I can, however, ping one of the hard drives and the other computers. When I go to map a network drive, it only shows my computer, nothing else.

Anyone have any idea?

UPDATE:

So it seems like I have fixed my computer not seeing other computers and mapping network drives.

Now the current problem is that whenever I try to transfer a file to a hard drive connected to my router (ASUS RT-N66U), it times out. I get the following error message.



Speed ranges rapidly from good (10 mbps) to horrible (0 kbps), and then just seems to cut out.

However, what's weird is that even though that error pops up, the drive is still connected. I can still browse the drive even though the error is appearing. So my best guess is that the drive is timing out, but yet reconnects itself (or never disconnects) instantly.
Help please?