Can not uninstall VSM，it prompt install was not complete

system>uninstall VSM，it prompt install was not complete 

none

1 uninstall library of network management
                          1 open catalog “C:\HWENGR\engineering\conf”
                       2 delete by hand the folder “datamodelDB”and files in this folder
2 restart data-base
                     1 double click Windows taskbar   ico and open “SQL Server manager” dialog box
                     2 click “stop”， closedown data base
                     3 click “start/continue”， startup data base
3 Be sure iMapService has been stoped
                     1 Click start menu，choose process> manage tools>service
                     2 examine whether iMapService already startup，if startup，please halt it
4 delete VSM’s install catalog，for example“D:\VSM”
If can not delete it，you must delete install catalog and folder，then delete install catalog
5 delete network management data base files by hand
1 Click start menu，choose process> Microsoft SQL Server > enterprise manager，pop-up program “SQL Server Enterprise Manager”
2 choose  “data base”node and delete all of data base except master、model、msdb、 pubs、tempdb、Northwind of this server in left navigation tree
3 choose “security> logging on”node of this server in left navigation tree，delete user“NMSuser”
6 restart operating system

During process of using，user changed or delete some envionment variables，result in  can not uninstall，need to uninstall it by hand

During use VSM, do not change envionment variables