如果忘记了VSS管理员密码，打开vss数据库所在的文件夹，打开data目录，找到um.dat文件，用hex编辑器打开编辑它，从offset 80的55 55 开始将值改为如下文所述的样子，然后保存，这样um.dat文件就回到了初始状态，然后打开vss admin,用admin用户登录，就不需要密码了。
0:80 55 55 bc 7f 41 64 6d 69 6e 00 00 00 00 00 00 00
0:90 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0:a0 00 00 00 00 90 6e 00 00 a8 01 00 00 00 00 00 00
0:80 55 55 bc 7f 41 64 6d 69 6e 00 00 00 00 00 00 00
0:90 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0:a0 00 00 00 00 90 6e 00 00 a8 01 00 00 00 00 00 00