>>If you also get 'cannot lock file', try this.
>>
>>To resolve this issue, increase the value of the IRPStackSize registry entry.
>>
>>To do this, follow these steps:
>>Click Start, click Run, type regedit, and then click OK.
>>Locate and then click the following registry subkey:
>>HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters
>>If the IRPStackSize entry is not present in this subkey, follow these steps:
>>Click Edit, point to New, and then click DWORD Value.
>>Type IRPStackSize, and then press ENTER.
>>
>>Note Type IRPStackSize exactly as it appears. The value name is case sensitive.
>>Click IRPStackSize, click Edit, and then click Modify.
>>In the Data Value box, type a larger value, and then click OK.
>>
>>Note Values may range from 0x1 to 0xC. These values are equivalent to 1 to 12 in decimal notation.
>>If the problem persists after you complete the previous procedure, increase the value of IRPStackSize more.
>>
>>We found setting this to 60 did the trick.
>
>Something doesn't add up. Allowed values range 1-12 and you set it to 60


The description of allowable values I copied from is not valid. I'm finding this elsewhere: Generally, the IRPStackSize value range is from 11 (0xb hexadecimal) to 50 (0x32 hexadecimal).