请教：如何解决mathcad15不能关联文件

网上搜索，已解决。用一个批文件解决了：
taskkill/f/imexplorer.exe
regadd"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ShellIcon
s"/v29/d"C:\Windows\system32\imageres.dll,154"/treg_sz/f
regadd"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\ShellIcons
"/v29/d"C:\Windows\system32\imageres.dll,154"/treg_sz/f
regadd"HKEY_CLASSES_ROOT\lnkfile"/vIsShortcut/treg_sz/f
regadd"HEKY_CLASSES_ROOT\piffile"/vIsShortcut/treg_sz/f
startexplorer