Windows 7 - Network Shares problem

I dont understand what is going on here.

Ok, I have a laptop and a desktop. Desktop is currently running 7 x64 and laptop is running 7 x86.

Few weeks ago I was able to access my LAPTOP from my DESKTOP normally by using the Network in the explorer. I was prompted to key in my Username and Password of my LAPTOP and I gained access after.

Now, I have no idea what happened to my DESKTOP. I am able to access other computers but not my LAPTOP. It keeps stating Network path not found with error code 0x80070035. Troubleshooting indicates no problems found.

I do dual-boot with Vista x64 on my DESKTOP and I am able to gain access to my LAPTOP using Vista.

One of the workaround I got for Windows 7 is to create HomeGroup and use my LAPTOP to join it and I can gain access to Network after that.

So, is this a HomeGroup bug and any fix for it?

EDIT: Never mind, I just re-create my password on my laptop and it's fine now. So, it's really weird.

still having the same problem whenever my laptop is connected to my router and it went to sleep/hibernate.