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Lost connection to my Synology DS412+ NAS box via Windows 7
I have 3 OS's in my house Win XP, 7 Home Premium SP1 and 8.1 all connected to my DS412+ with cat 5 cables and wireless just fine. The XP and 7 OS's are setup as a dual boot system on the same machine. The 8.1 system is on a wireless laptop. I have a cable modem provided by the local cable co. running into a ES3000 wireless router connected to a Netgear 8 port switch. I am running the free version of AVAST. Everything was running fine all together until about a week or two ago. Something happened on the Win 7 machine to where it would no longer connect to the DS412+ box. The Win XP and 8.1 computers connect fine. When I try to connect to one of the servers in the box, via IE 11 on the Win 7 system, I see a Windows Tab saying "Waiting for 192.168.xxx.xxx with the spinning circle. I can ping the address and that works fine. I have checked the settings in the DS box via Win 8.1 for anything that would block Win 7 from accessing it, nothing found.I looked through the security settings in Windows 7 and didn't see anything that was blocking the DS box. I have disabled AVAST to see if it was causing problems, nothing there. I have done a factory reset on the ES3000 and the XP, 8.1 systems still connect just fine. No connection for Win 7.
I have asked these same questions on the Synoloyy forums and have checked everything they suggested. Just for the heck of it, I booted up with my Acronis 2010 boot disk and was able to see the drives and files on both servers in the DS box with no problems. So I thought I'd stop in to the Win 7 forums and see if I could find answers here. I did a search on the networking forums to find similar problems and tried a few suggestions from them. No Help!! I have run ipconfig /all on both Win 7 and 8.1 systems to try and see if there was a difference there, nothing I could see. While writing this, there has been a couple Win 7 updates installed lately. In case you are wondering why I have the Netgear 8 port switch, it's because the NAS box has 2 servers, my computer and my wife's computer runs off the ES3000 and 2 computers in the garage, One for TV and surfing and the other for my milling machine run off the switch.
I am getting to the point where I think I may have to format and reload Win 7 but I hope someone has seen this before and can point me to a setting that will fix this BEFORE I get to that point.
Thank you
johntech