Can't access shared folder of win8/win7 machine - Error code: 0x80004005. Unspecified Error

Use Regedit to Create LocalAccountTokenFilterPolicy Value

This is an extract from my account of the access denied problem

Type Regedit in the Search dialog box, right-click the executable and Run as administrator.

Once Regedit launches navigate to this path:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System 

For a 32 bit system, create a new DWORD value called LocalAccountTokenFilterPolicy. For a 64 bit system, make a QWORD (64-bit) called LocalAccountTokenFilterPolicy.

In either case, set the value to numeric 1 (meaning on), and remember to click OK. Usually, the LocalAccountTokenFilterPolicy value gets created before you have a chance to set the data value; no problem, just double-click and modify the data from 0 to 1.