There has been a few times I have seen this message. Each time it had to do with my moving files in and out of a mounted network share from my Linux box. Tonight while moving files around and doing some scanning. I found myself with the error above.

After rebooting my Windows 7 host I am able to once again access files, only to have the issue all over again after moving a large number of files. I guess someone doesn’t want a Windows 7 desktop acting as a server. Well I have a quick fix that has worked for that.

On the Windows 7 host open the registry editor and set the following: 

Locate the following registry key: 
HKLMSYSTEMCurrentControlSetControlSession ManagerMemory ManagementLargeSystemCache and set its value to 1

Then locate the following registry key:
HKLMSYSTEMCurrentControlSetServicesLanmanServerParametersSize and set the value of 3

Then *reboot*