well, I can only give one router model as the others are either 3500 miles away, a hotel, and my work (where I'll be back in a week). I can access none of them if I try the 'Guest' wireless account... only the main or admin account that allows full access on the network. Never got on to the hotel guest access since I could not get the admin account access.
My home router is a Belkin Play N600. No homegroup, just shared drives on the computers. If I am on the admin account, I can access everything just fine - read, move, copy and delete across my network.
My issue is I cannot access any Guest access accounts on the wireless routers. With either of my laptops. I should note that anyone that tries the same Guest account with a 32bit version of Windows 7 has no problems at all, so I know they are working and passwords are correct. The login page via web browser never loads for me. The tab for the session shows the name of the login page, but always times out. I've tried IE 9.03, Firefox 8.0 and Firefox Nightlies. The difference between my laptops and those that CAN access the guest accounts is simply that they are using 32bit and I am 64bit Windows 7.
It's not a huge issue, since the router I need to access, I have admin account access on. But I'm just trying to figure this out in case I need it down the road. The hotel non-access was no problem... just played games on my M11x instead of cruising the web.