[本站原创]注册表，Windows的系统数据库。在它里面存储了所有硬件、软件、用户和计算机性能的信息和设置。我们一旦更改了某个设置，改变了文件关联或者安装了什么新的软件。注册表的中的有关内容它也进行相应的变化，并以最新的数据内容进行保存。为了安全，我们在使用电脑过程的，经常会向电脑输入了若干个密码（或是ID）。如果一时的大意，将这些要命的密码（或ID）给忘了，那再想使用被设置有密码的软件时，就非常麻烦了。那怎么办呢？其实通过刚才的介绍，我们的设置的密码（或ID）都会随着我们的设置更动，以不同的形式保存在注册表中，我们只要在注册表中找到相应的密码设置项，进行重现或是修改，问题也就迎刃而解。下面就一些常见密码的注册表位置向大家作一介绍，以便大家急用。
1．Windows 98启动密码
为了体现个性，很多同志在Windows系统中设置了用户名与密码。虽然设置好的用户名密码被遗忘后，我们还可以进入操作系统，但它会导致用户无法进入自己的个人设置。为了找到这份"丢失"的"个性"，我们可以打开注册表进行修改。
运行"regedit.exe"，打开注册表编辑器，打开中找到：HKEY_LOCAL_MACHINE\Network\Logon 分支。在该分支下面有一个"UserProfiles"键值，双击打开它，然后原来的"1"修改为"0"。重新启动Windows后，系统会弹出一个不包含任何用户名的密码设置框，我们无需输入任何内容，直接点击"确定"按钮，Windows 密码即被删除了（如图1）。
图1 编辑字符串
2．IE浏览器分级审查的密码
为了防止一些用户在上网时访问一些不健康或者暴力等方面的内容，很多人喜欢在IE浏览器中的"Internet属性"对话框的"内容"选项卡的"分级审查"框中设置口令。这样如果想打开设置级别以后的网页时，就要输入口令。如果口令一定不对，那就会停止浏览。即使你重新安装IE也无法去掉口令保护哟，因为该口令已经保存在注册表中了。
首先运行注册表编辑器，然后从中找开：
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Ratings分支，只要将该分支下面的"FileName0"和"Key" 这两个键值，删除即可去掉口令。
3．查看Windows共享密码
在局域网中，设置共享密码是一件经常需要操作的事儿。如果一时的遗忘，我们可以到注册表中找到它的共享密码。
首先运行注册表编辑器，然后从中找开：
HKEY_LOCAL _MACHINE\SOFTWARE\Microsoft\Windows\Current Version\Network\LanMan 分支，在该分支下面有一个parm1en，双击打开它，如果发现的键值为"74d80e"，我们将它两个字节为一组，分一分。从而得出三组，从而是"74 d8 0e"，然后将这三组字符到下面的表格中找到相应的字符。
A =74 =db =0c =e7 =12 =e8 =95 =2b
B =77 =d8 =0f =e4 =11 =eb =96 =28
C =76 =d9 =0e =e5 =10 =ea =97 =29
D =71 =de =09 =e2 =17 =ed =90 =2e
E =70 =df =08 =e3 =16 =ec =91 =2f
F =73 =dc =0b =e0 =15 =ef =92 =2c
G =72 =dd =0a =e1 =14 =ee =93 =2d
H =7d =d2 =05 =ee =1b =e1 =9c =22
I =7c =d3 =04 =ef =1a =e0 =9d =23
J =7f =d0 =07 =ec =19 =e3 =9e =20
K =7e =d1 =06 =ed =18 =e2 =9f =21
L =79 =d6 =01 =ea =1f =e5 =98 =26
M =78 =d7 =00 =eb =1e =e4 =99 =27
N =7b =d4 =03 =e8 =1d =e7 =9a =24
O =7a =d5 =02 =e9 =1c =e6 =9b =25
P =65 =ca =1d =f6 =03 =f9 =84 =3a
Q =64 =cb =1c =f7 =02 =f8 =85 =3b
R =67 =c8 =1f =f4 =01 =fb =86 =38
S =66 =c9 =1e =f5 =00 =fa =87 =39
T =61 =ce =19 =f2 =07 =fd =80 =3e
U =60 =cf =18 =f3 =06 =fc =81 =3f
V =63 =cc =1b =f0 =05 =ff =82 =3c
W =62 =cd =1a =f1 =04 =fe =83 =3d
X =6d =c2 =15 =fe =0b =f1 =8c =32
Y =6c =c3 =14 =ff =0a =f0 =8d =33
Z =6f =c0 =17 =fc =09 =f3 =8e =30
space =15 =ba =6d =86 =73 =89 =f4 =4a
1 =04 =ab =7c =97 =62 =98 =e5 =5b
2 =07 =a8 =7f =94 =61 =9b =e6 =58
3 =06 =a9 =7e =95 =60 =9a =e7 =59
4 =01 =ae =79 =92 =67 =9d =e0 =5e
5 =00 =af =78 =93 =66 =9c =e1 =5f
6 =03 =ac =7b =90 =65 =9f =e2 =5c
7 =02 =ad =7a =91 =64 =9e =e3 =5d
8 =0d =a2 =75 =9e =6b =91 =ec =52
9 =0c =a3 =74 =9f =6a =90 =ed =53
0 =05 =aa =7d =96 =63 =99 =e4 =5a
~ =4b =e4 =33 =d8 =2d =d7 =aa =14
` =55 =fa =2d =c6 =33 =c9 =b4 =0a
! =14 =bb =6c =87 =72 =88 =f5 =4b
@ =75 =da =0d =e6 =13 =e9 =94 =2a
# =16 =b9 =6e =85 =70 =8a =f7 =49
$ =11 =be =69 =82 =77 =8d =f0 =4e
% =10 =bf =68 =83 =76 =8c =f1 =4f
^ =6b =c4 =13 =f8 =0d =f7 =8a =34
& =13 =bc =6b =80 =75 =8f =f2 =4c
* =1f =b0 =67 =8c =79 =83 =fe =40
( =1d =b2 =65 =8e =7b =81 =fc =42
) =1c =b3 =64 =8f =7a =80 =fd =43
- =18 =b7 =60 =8b =7e =84 =f9 =47
_ =6a =c5 =12 =f9 =0c =f6 =8b =35
+ =1e =b1 =66 =8d =78 =82 =ff =41
= =08 =a7 =70 =9b =6e =94 =e9 =57
[ =6e =c1 =16 =fd =08 =f2 =8f =31
] =68 =c7 =10 =fb =0e =f4 =89 =37
{ =4e =e1 =36 =dd =28 =d2 =af =11
} =48 =e7 =30 =db =2e =d4 =a9 =17
; =0e =a1 =76 =9d =68 =92 =ef =51
: =0f =a0 =77 =9c =69 =93 =ee =50
' =12 =bd =6a =81 =74 =8e =f3 =4d
" =17 =b8 =6f =84 =71 =8b =f6 =48
, =19 =b6 =61 =8a =7f =85 =f8 =46
< =09 =a6 =71 =9a =6f =95 =e8 =56
. =1b =b4 =63 =88 =7d =87 =fa =44
> =0b =a4 =73 =98 =6d =97 =ea =54
? =0a =a5 =72 =99 =6c =96 =eb =55
/ =1a =b5 =62 =89 =7c =86 =fb =45
\ =69 =c6 =11 =fa =0f =f5 =88 =36
| =49 =e6 =31 =da =2f =d5 =a8 =16
我们不难得出"74 d8 0e"所对应的字母是"ABC"，从而得出这个共享密码为"ABC"。
4.查看Windows优化大师的密码
Windows优化大师是我们常用的优化软件之一。为了保护自己设置好的优化方案，我们一般情况下会设置一个密码来保护。在没有密码的情况下，别人是无法打开Windows优化大师进行重新设置了。如果要查看Windows优化大师的设置密码也不是难事，只要打开注册表编辑器，从中找到：HKEY_LOCAL_MACHINE\Software\Wom分支，然后在分支下，找到字符串"Pass"，这时你会看到该字符串的键值，它就是我们想找的Windows优化大师的密码（如图2）。
图2 修改注册表
5．查看共享软件的安装密匙
在安装共享软件过程，基本上都需要输入安装密匙。下面将一些常用软件的密匙在注册表中的具体位置介绍大家，是助大家备查。
(1)Windows 的安装密匙
[HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion]下面的ProdUCtId键值就是Windows 安装密匙（如图3）。
图3 编辑字符串
(2)Flash FX的安装密匙
[HKEY_LOCAL_MACHINE\Software\Microsoft\Macromedia\flash\6\Registration]下面的Serial Number键值便为Flash FX安装密匙。
(3) Dreamweaver的安装密匙
[HKEY_LOCAL_MACHINE\Software\Microsoft\Macromedia\Dreamweaver\4\Registration]下面的Serial Number键值便为Dreamweaver安装密匙。
(4) Fireworks的安装密匙
[HKEY_LOCAL_MACHINE\Software\Microsoft\Macromedia\Fireworks\4\Registration]下面的Serial Number键值便为Fireworks的安装密匙。
（5）瑞星的升级密匙（ID）
[HKEY_LOCAL_MACHINE\Software\Rising\Rav]下面的NetID的键值便为端星软件的升级的ID。
（出处：http://www.sheup.com）