Lionel:
I read your request, and Kees' response. Perhaps I have been 
  doing it
"wrong" all these years. I just go to Windows Explorer and 
  delete
whatever MS data folder I want to remove, OR if I want to just 
  delete
all the stocks in the folder, I open MS, open the folder in 
  question,
select all the stocks, and just Delete them.
This has 
  worked (so far) on both my 8.01 and 10.1.
Harry
On 5 May 2008 
  11:05:40 -0000, "Lionel Issen" lissen@xxxxxxxxxxnet
wrote:
>>I 
  am trying to delete a subfolder from my data folder. The first time 
  I
>>tried to simply delete the folder from the data list. Big 
  mistake. When I
>>opened MS I got an error message that folder X 
  could not be found. MS hung
>>up, I could only close it down. I 
  finally had to reinstall the deleted
>>folder in order to be able to 
  run MS. I have deleted folders in the past
>>without any 
  problems.