delete all .scc files and .vspscc files. Search for *.scc and *.vspscc in
Windows Explorer and delete all files that you find.

Then, make all files writeable by changing the ACLs. The easiest way to make
writeable is select the files and clear the "read only" checkbox (windows
explorer, right click file(s) and select properties). Depending on windows
version, you may be able to walk the entire tree (ie, select all folders and
set properties), but some versions require that you individual walk through
each subfolder and select the items and make sure they are not read only.

You should then find that VS .NET sees the files as not under source
control. When you check them back in, you will find the tree being recreated
in SourceSafe and the .scc and .vspscc files being recreated - and all files
will be marked read only again.