First of all, we don't recommend share the C drive.
1. Have you share the C drive? Posting the result of net share result here
2. Have you assigned permission in both Sharing and Security?
This search result may help too.
Vista Permission Issues
Mar 19, 2007 ... Can I assume the external drive used to be connecting
to other computer and you just re-connect it the the Vista? Check the
permission using ...
Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
How to Setup Windows, Network, VPN & Remote Access on
"PA Bear [MS MVP]" <PABearMVP@gmail.com> wrote in message
> [[Forwarded to microsoft.public.windows.vista.networking_sharing newsgroup
> via crosspost.]]
> BG wrote:
>> Im running two machines, both with vista home basic OS's - in Chinese.
>> can see each other through wireless router, but one cant go into others
>> drive. Access is denied. I need to be able to map drives freely and see
>> others drives, folders and files. Any assistance would be greatly
>> appreciated. (I have even been able to map the drives, but cant get into
>> them), though have been able to share a printer. I have tried numerous
>> avenues, such as adding "everyone" to permissions, but still have not
>> able to achieve success. I know this is possible and probably really
>> just missing something along the way.
>> Thank you for your assistance.