常规解决方法：
1.解决杂乱文件影响（减少电脑负担）。
清理杂乱文件有三个方法，第一是点网页上的“工具”，点“Internet选项（0）”，在新页面分别点“删除Cookies（I）”“删除文件（F）”“清除历史记录（H）”、最后“确定”；第二是用“磁盘清理”，把鼠标指向程序——附件——系统工具——就显示出“磁盘清理”，所有的盘C、D、E等都要清理（主要是系统盘C），第三是“整理磁盘碎片”，把鼠标指向程序——附件——系统工具——就显示出“整理磁盘碎片程序”，主要是整理系统盘C，很慢一般要一到两个小时甚至更多时间。这三种方法可以单独使用，都可以有效的清除正常浏览网页没有保存的所有临时文件，有用的系统文件和安装保存的文件不会被清理。用第一或第二的方法配合第三的方法效果会更好，可以明显改善电脑速度。
2.解决恶意流氓软件、恶意流氓插件和木马影响。
恶意流氓软件、恶意流氓插件和木马，除少数是躲在自己下载的软件和安装的代码里面以外，主要是自己强行安装进电脑的，目的就是干扰操作系统，影响程序正常工作，用“磁盘清理”清不掉，杀毒软件发现不了，用瑞星卡卡助手、奇虎360、清理大师、木马清道夫等等凡杀毒软件配置的助手，都可以用系统优化功能、系统防护功能等有效的清除恶意流氓软件、恶意流氓插件和木马，只要经常清理，就可以保证电脑不受影响。
3.经常更新病毒库，升级杀毒，不要让病毒长期存留在电脑里，选择高级设置，发现病毒杀毒，杀不了隔离文件、隔离不了删除 文件、要保证电脑没有保存有病毒，有病毒及时根除。
4.电脑遭遇病毒是难免的，为了减少重装系统的麻烦，一定要在装系统时装“一键恢复” 。“一键恢复”就是操作系统备份，一般是装系统时设置，也就是确保操作系统健康。 在电脑遭遇病毒无法清除、程序错乱，速度特别慢等严重问题时，任何时候“一键恢复”，电脑就恢复到健康正常的系统，保证正常操作。
5、如果有杀毒软件无法解决的病毒、反复显示要压缩杀毒的、不能清除的病毒、不能删除的病毒文件等，经过上面介绍的1、2两种清理再杀毒就可以解决。
6.修补漏洞和系统更新，绝大部分用户使用的都是盗版XP系统，正常情况盗版XP系统都是能正常工作的，修补漏洞和自动更新没有意义；盗版XP省略了很多不经常用的程序，经常修补漏洞和系统更新，并不能修补和更新，下载的软件装在电脑里，白占了很多内存，降低了速度，严重时会使系统程序发生错乱，造成系统不正常工作。
7.经常清理硬盘，不要在硬盘CDEF等装过多的软件，特别是不经常用的，网上容易下载的，都不要保存，硬盘保存的东西多了直接影响电脑速度的。
8.重新启动路由器或交换机。
9.将ip改动一下，一般只要改最后一个字段
关于解决windows7安装CAD出现错误1606，而出现显示WINDOWS系统错误方法：
1、首先在桌面的空白处鼠标右击选择“新建--文本文档”选项;
2、然后将以下内容复制到记事本里面，
代码如下:
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionExplorerShell Folders]
"!Do not use this registry key"="Use the SHGetFolderPath or SHGetKnownFolderPath function instead"
"AppData"=hex(2):25,00,55,00,53,00,45,00,52,00,50,00,52,00,4f,00,46,00,49,00,
4c,00,45,00,25,00,5c,00,41,00,70,00,70,00,44,00,61,00,74,00,61,00,5c,00,52,
00,6f,00,61,00,6d,00,69,00,6e,00,67,00,00,00
"Cache"=hex(2):25,00,55,00,53,00,45,00,52,00,50,00,52,00,4f,00,46,00,49,00,4c,
00,45,00,25,00,5c,00,41,00,70,00,70,00,44,00,61,00,74,00,61,00,5c,00,4c,00,
6f,00,63,00,61,00,6c,00,5c,00,4d,00,69,00,63,00,72,00,6f,00,73,00,6f,00,66,
00,74,00,5c,00,57,00,69,00,6e,00,64,00,6f,00,77,00,73,00,5c,00,54,00,65,00,
6d,00,70,00,6f,00,72,00,61,00,72,00,79,00,20,00,49,00,6e,00,74,00,65,00,72,
00,6e,00,65,00,74,00,20,00,46,00,69,00,6c,00,65,00,73,00,00,00
"Cookies"=hex(2):25,00,55,00,53,00,45,00,52,00,50,00,52,00,4f,00,46,00,49,00,
4c,00,45,00,25,00,5c,00,41,00,70,00,70,00,44,00,61,00,74,00,61,00,5c,00,52,
00,6f,00,61,00,6d,00,69,00,6e,00,67,00,5c,00,4d,00,69,00,63,00,72,00,6f,00,
73,00,6f,00,66,00,74,00,5c,00,57,00,69,00,6e,00,64,00,6f,00,77,00,73,00,5c,
00,43,00,6f,00,6f,00,6b,00,69,00,65,00,73,00,00,00
"Desktop"=hex(2):25,00,55,00,53,00,45,00,52,00,50,00,52,00,4f,00,46,00,49,00,
4c,00,45,00,25,00,5c,00,44,00,65,00,73,00,6b,00,74,00,6f,00,70,00,00,00
"Favorites"=hex(2):25,00,55,00,53,00,45,00,52,00,50,00,52,00,4f,00,46,00,49,00,
4c,00,45,00,25,00,5c,00,46,00,61,00,76,00,6f,00,72,00,69,00,74,00,65,00,73,
00,00,00
"History"=hex(2):25,00,55,00,53,00,45,00,52,00,50,00,52,00,4f,00,46,00,49,00,
4c,00,45,00,25,00,5c,00,41,00,70,00,70,00,44,00,61,00,74,00,61,00,5c,00,4c,
00,6f,00,63,00,61,00,6c,00,5c,00,4d,00,69,00,63,00,72,00,6f,00,73,00,6f,00,
66,00,74,00,5c,00,57,00,69,00,6e,00,64,00,6f,00,77,00,73,00,5c,00,48,00,69,
00,73,00,74,00,6f,00,72,00,79,00,00,00
"Local AppData"=hex(2):25,00,55,00,53,00,45,00,52,00,50,00,52,00,4f,00,46,00,
49,00,4c,00,45,00,25,00,5c,00,41,00,70,00,70,00,44,00,61,00,74,00,61,00,5c,
00,4c,00,6f,00,63,00,61,00,6c,00,00,00
"My Pictures"=hex(2):25,00,55,00,53,00,45,00,52,00,50,00,52,00,4f,00,46,00,49,
00,4c,00,45,00,25,00,5c,00,50,00,69,00,63,00,74,00,75,00,72,00,65,00,73,00,
00,00
"My Music"=hex(2):25,00,55,00,53,00,45,00,52,00,50,00,52,00,4f,00,46,00,49,00,
4c,00,45,00,25,00,5c,00,4d,00,75,00,73,00,69,00,63,00,00,00
"My Video"=hex(2):25,00,55,00,53,00,45,00,52,00,50,00,52,00,4f,00,46,00,49,00,
4c,00,45,00,25,00,5c,00,56,00,69,00,64,00,65,00,6f,00,73,00,00,00
"{374DE290-123F-4565-9164-39C4925E467B}"=hex(2):25,00,55,00,53,00,45,00,52,00,
50,00,52,00,4f,00,46,00,49,00,4c,00,45,00,25,00,5c,00,44,00,6f,00,77,00,6e,
00,6c,00,6f,00,61,00,64,00,73,00,00,00
"NetHood"=hex(2):25,00,55,00,53,00,45,00,52,00,50,00,52,00,4f,00,46,00,49,00,
4c,00,45,00,25,00,5c,00,41,00,70,00,70,00,44,00,61,00,74,00,61,00,5c,00,52,
00,6f,00,61,00,6d,00,69,00,6e,00,67,00,5c,00,4d,00,69,00,63,00,72,00,6f,00,
73,00,6f,00,66,00,74,00,5c,00,57,00,69,00,6e,00,64,00,6f,00,77,00,73,00,5c,
00,4e,00,65,00,74,00,77,00,6f,00,72,00,6b,00,20,00,53,00,68,00,6f,00,72,00,
74,00,63,00,75,00,74,00,73,00,00,00
"Personal"=hex(2):25,00,55,00,53,00,45,00,52,00,50,00,52,00,4f,00,46,00,49,00,
4c,00,45,00,25,00,5c,00,44,00,6f,00,63,00,75,00,6d,00,65,00,6e,00,74,00,73,
00,00,00
"PrintHood"=hex(2):25,00,55,00,53,00,45,00,52,00,50,00,52,00,4f,00,46,00,49,00,
4c,00,45,00,25,00,5c,00,41,00,70,00,70,00,44,00,61,00,74,00,61,00,5c,00,52,
00,6f,00,61,00,6d,00,69,00,6e,00,67,00,5c,00,4d,00,69,00,63,00,72,00,6f,00,
73,00,6f,00,66,00,74,00,5c,00,57,00,69,00,6e,00,64,00,6f,00,77,00,73,00,5c,
00,50,00,72,00,69,00,6e,00,74,00,65,00,72,00,20,00,53,00,68,00,6f,00,72,00,
74,00,63,00,75,00,74,00,73,00,00,00
"Programs"=hex(2):25,00,55,00,53,00,45,00,52,00,50,00,52,00,4f,00,46,00,49,00,
4c,00,45,00,25,00,5c,00,41,00,70,00,70,00,44,00,61,00,74,00,61,00,5c,00,52,
00,6f,00,61,00,6d,00,69,00,6e,00,67,00,5c,00,4d,00,69,00,63,00,72,00,6f,00,
73,00,6f,00,66,00,74,00,5c,00,57,00,69,00,6e,00,64,00,6f,00,77,00,73,00,5c,
00,53,00,74,00,61,00,72,00,74,00,20,00,4d,00,65,00,6e,00,75,00,5c,00,50,00,
72,00,6f,00,67,00,72,00,61,00,6d,00,73,00,00,00
"Recent"=hex(2):25,00,55,00,53,00,45,00,52,00,50,00,52,00,4f,00,46,00,49,00,4c,
00,45,00,25,00,5c,00,41,00,70,00,70,00,44,00,61,00,74,00,61,00,5c,00,52,00,
6f,00,61,00,6d,00,69,00,6e,00,67,00,5c,00,4d,00,69,00,63,00,72,00,6f,00,73,
00,6f,00,66,00,74,00,5c,00,57,00,69,00,6e,00,64,00,6f,00,77,00,73,00,5c,00,
52,00,65,00,63,00,65,00,6e,00,74,00,00,00
"SendTo"=hex(2):25,00,55,00,53,00,45,00,52,00,50,00,52,00,4f,00,46,00,49,00,4c,
00,45,00,25,00,5c,00,41,00,70,00,70,00,44,00,61,00,74,00,61,00,5c,00,52,00,
6f,00,61,00,6d,00,69,00,6e,00,67,00,5c,00,4d,00,69,00,63,00,72,00,6f,00,73,
00,6f,00,66,00,74,00,5c,00,57,00,69,00,6e,00,64,00,6f,00,77,00,73,00,5c,00,
53,00,65,00,6e,00,64,00,54,00,6f,00,00,00
"Start Menu"=hex(2):25,00,55,00,53,00,45,00,52,00,50,00,52,00,4f,00,46,00,49,
00,4c,00,45,00,25,00,5c,00,41,00,70,00,70,00,44,00,61,00,74,00,61,00,5c,00,
52,00,6f,00,61,00,6d,00,69,00,6e,00,67,00,5c,00,4d,00,69,00,63,00,72,00,6f,
00,73,00,6f,00,66,00,74,00,5c,00,57,00,69,00,6e,00,64,00,6f,00,77,00,73,00,
5c,00,53,00,74,00,61,00,72,00,74,00,20,00,4d,00,65,00,6e,00,75,00,00,00
"Startup"=hex(2):25,00,55,00,53,00,45,00,52,00,50,00,52,00,4f,00,46,00,49,00,
4c,00,45,00,25,00,5c,00,41,00,70,00,70,00,44,00,61,00,74,00,61,00,5c,00,52,
00,6f,00,61,00,6d,00,69,00,6e,00,67,00,5c,00,4d,00,69,00,63,00,72,00,6f,00,
73,00,6f,00,66,00,74,00,5c,00,57,00,69,00,6e,00,64,00,6f,00,77,00,73,00,5c,
00,53,00,74,00,61,00,72,00,74,00,20,00,4d,00,65,00,6e,00,75,00,5c,00,50,00,
72,00,6f,00,67,00,72,00,61,00,6d,00,73,00,5c,00,53,00,74,00,61,00,72,00,74,
00,75,00,70,00,00,00
"Templates"=hex(2):25,00,55,00,53,00,45,00,52,00,50,00,52,00,4f,00,46,00,49,00,
4c,00,45,00,25,00,5c,00,41,00,70,00,70,00,44,00,61,00,74,00,61,00,5c,00,52,
00,6f,00,61,00,6d,00,69,00,6e,00,67,00,5c,00,4d,00,69,00,63,00,72,00,6f,00,
73,00,6f,00,66,00,74,00,5c,00,57,00,69,00,6e,00,64,00,6f,00,77,00,73,00,5c,
00,54,00,65,00,6d,00,70,00,6c,00,61,00,74,00,65,00,73,00,00,00
"CD Burning"=hex(2):25,00,55,00,53,00,45,00,52,00,50,00,52,00,4f,00,46,00,49,
00,4c,00,45,00,25,00,5c,00,41,00,70,00,70,00,44,00,61,00,74,00,61,00,5c,00,
4c,00,6f,00,63,00,61,00,6c,00,5c,00,4d,00,69,00,63,00,72,00,6f,00,73,00,6f,
00,66,00,74,00,5c,00,57,00,69,00,6e,00,64,00,6f,00,77,00,73,00,5c,00,42,00,
75,00,72,00,6e,00,5c,00,42,00,75,00,72,00,6e,00,00,00
"Fonts"=hex(2):25,00,77,00,69,00,6e,00,64,00,69,00,72,00,25,00,5c,00,46,00,6f,
00,6e,00,74,00,73,00,00,00
3、复制粘贴完成之后将文件另存为 *.reg格式，保存之后双击导入注册表，然后安装CAD软件即可，就不会再发现错误了。
Windows更新系统出现错误代码8024402F，而出现显示WINDOWS系统错误解决办法：
1、更新出现错误后点击再试一次，如果还是那个错误再进行一下步骤。首先找到系统与安全→管理工具→ 服务。
2、停止Windows Update并等待关闭完成。
3、快捷键Win+R调出运行窗口，输入C://Windows//SoftwareDistribution后点击确定。这个时候会跳出文件管理，删除其中得DataStore和Download
4、删除完毕后重新启动Windows Update服务。
5、这个时候再次检查更新，第一次可能会仍然出现8024402F错误，不过不要担心，再试一次即可。
注意事项：用系统自带更新永远比第三方软件安全，不过鉴于微软服务器在中国并不是很多，往往下载容易出现断了或者错误，大家耐心多试几次即可。