win7重建图标缓存bat、“保存类型”选择“所有文件”即可。本人被这个情况困扰很久，此文适用于Windows 7,Windows Vista,Windows 2008。方法如下： 

以下是引用片段： 
打开任何一个文件夹，找到IconCache.db文件并删除，

代码：
rem 关闭Windows外壳程序explorer
taskkill /f /im explorer.exe
rem 清理系统图标缓存数据库
attrib -h -s -r "%userprofile%\AppData\Local\IconCache.db"
del /f "%userprofile%\AppData\Local\IconCache.db"
attrib /s /d -h -s -r "%userprofile%\AppData\Local\Microsoft\Windows\Explorer\*"
del /f "%userprofile%\AppData\Local\Microsoft\Windows\Explorer\thumbcache_32.db"
del /f "%userprofile%\AppData\Local\Microsoft\Windows\Explorer\thumbcache_96.db"
del /f "%userprofile%\AppData\Local\Microsoft\Windows\Explorer\thumbcache_102.db"
del /f "%userprofile%\AppData\Local\Microsoft\Windows\Explorer\thumbcache_256.db"
del /f "%userprofile%\AppData\Local\Microsoft\Windows\Explorer\thumbcache_1024.db"
del /f "%userprofile%\AppData\Local\Microsoft\Windows\Explorer\thumbcache_idx.db"
del /f "%userprofile%\AppData\Local\Microsoft\Windows\Explorer\thumbcache_sr.db"
rem 清理 系统托盘记忆的图标
echo y|reg delete "HKEY_CLASSES_ROOT\Local Settings\Software\Microsoft\Windows\CurrentVersion\TrayNotify" /v IconStreams
echo y|reg delete "HKEY_CLASSES_ROOT\Local Settings\Software\Microsoft\Windows\CurrentVersion\TrayNotify" /v PastIconsStream
rem 重启Windows外壳程序explorer
start explorer

复制粘贴到TXT，把一个最简单有效的方法推荐给大家。网上也找了很多方法， 

@echo off 
title win7桌面图标黑块修复工具 
reg delete “hkcu\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Icons” /f 
reg delete “hklm\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Icons” /f 
taskkill /f /im explorer.exe & start explorer.exe 

通过上述两个方法，然后在地址栏输入%USERPROFILE%\AppData\Local后按回车键即可跳转到local目录，