Script to reset user dashboard in Alfresco. Actually two scripts in same Gist. To be used with the Alfresco Javascript console//

resetDashboard.js

//***** Script variant one, fore one user ********
var userid = "userid01";

var searchobj = {
  query:'PATH:"/app:company_home/st:sites/cm:surf-config/cm:components/*" AND @cm\:name:"*'+userid+'*"',
  language: 'fts-alfresco'
};

var nodes = search.query(searchobj);

for(i=0, ii=nodes.length;i<ii;i++){
  //use only the dashboard ones
  if(nodes[i].name.indexOf('dashboard')>-1){
    print(nodes[i].name);
    //nodes[i].remove();
  }
}
print('***')
searchobj.query = 'PATH:"/app:company_home/st:sites/cm:surf-config/cm:pages/cm:user/cm:'+userid+'/*"';
nodes = search.query(searchobj);
for(i=0, ii=nodes.length;i<ii;i++){
  //use only the dashboard ones
  if(nodes[i].name.indexOf('dashboard')>-1){
    print(nodes[i].name);
    //nodes[i].remove();
  }
}
print(new Date().toString());

//***** Script variant two, fore all users dashboard ********
print('Deleting all user welcome dashboards');
var searchobj = {
  query:'PATH:"/app:company_home/st:sites/cm:surf-config/cm:components/*" AND @cm\:name:"*dashboard*"',
  language: 'fts-alfresco'
};

var nodes = search.query(searchobj);

for(i=0, ii=nodes.length;i<ii;i++){
  
  //use only the dashboard ones
  if(nodes[i].name.indexOf('user')>-1 && nodes[i].name.indexOf('width')>-1){
    print(nodes[i].name);
    //nodes[i].remove();
  }
}

print(new Date().toString());
print('Finished');

nodes[i].remove(); is commented out above, this way you can do a dry run. Remove comment to actually remove dashboard components.