win7系统为何桌面右键没有新建word，point和Excel？

 Word：

Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT.docx]
@="Word.Document.12"
"ContentType"="application/vnd.openxmlformats-officedocument.wordprocessingml.document"
"PerceivedType"="document"
[HKEY_CLASSES_ROOT\.docx\PersistentHandler]
@="{D3B41FA1-01E3-49AF-AA25-1D0D824275AE}"
[HKEY_CLASSES_ROOT\.docx\ShellEx]
[HKEY_CLASSES_ROOT\.docx\ShellEx\PropertyHandler]
@="{D3B41FA1-01E3-49AF-AA25-1D0D824275AE}"
[HKEY_CLASSES_ROOT\.docx\ShellEx\{8895b1c6-b41f-4c1c-a562-0d564250836f}]
@="{84F66100-FF7C-4fb4-B0C0-02CD7FB668FE}"
[HKEY_CLASSES_ROOT\.docx\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}]
@="{C41662BB-1FA0-4CE0-8DC5-9B7F8279FF97}"
[HKEY_CLASSES_ROOT\.docx\Word.Document.12]
[HKEY_CLASSES_ROOT\.docx\Word.Document.12\ShellNew]
"NullFile"=""

Excel：

Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT.xlsx]
@="Excel.Sheet.12"
"ContentType"="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
"PerceivedType"="document"
[HKEY_CLASSES_ROOT\.xlsx\PersistentHandler]
@="{4887767F-7ADC-4983-B576-88FB643D6F79}"
[HKEY_CLASSES_ROOT\.xlsx\ShellEx]
[HKEY_CLASSES_ROOT\.xlsx\ShellEx\PropertyHandler]
@="{33154C99-BF49-443D-A73C-303A23ABBE97}"
[HKEY_CLASSES_ROOT\.xlsx\ShellEx\{8895b1c6-b41f-4c1c-a562-0d564250836f}]
@="{00020827-0000-0000-C000-000000000046}"
[HKEY_CLASSES_ROOT\.xlsx\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}]
@="{72B66649-3DBF-429F-BD6F-7774A9784B78}"
[HKEY_CLASSES_ROOT\.xlsx\Excel.Sheet.12]
[HKEY_CLASSES_ROOT\.xlsx\Excel.Sheet.12\ShellNew]
"NullFile"=""
PPT：
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT.pptx]
@="PowerPoint.Show.12"
"ContentType"="application/vnd.openxmlformats-officedocument.presentationml.presentation"
"PerceivedType"="document"
[HKEY_CLASSES_ROOT\.pptx\PersistentHandler]
@="{4F46F75F-199F-4C63-8B7D-86D48FE7970C}"
[HKEY_CLASSES_ROOT\.pptx\ShellEx]
[HKEY_CLASSES_ROOT\.pptx\ShellEx\PropertyHandler]
@="{01BE4CFB-129A-452B-A209-F9D40B3B84A5}"
[HKEY_CLASSES_ROOT\.pptx\ShellEx\{8895b1c6-b41f-4c1c-a562-0d564250836f}]
@="{65235197-874B-4A07-BDC5-E65EA825B718}"
[HKEY_CLASSES_ROOT\.pptx\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}]
@="{35C5242B-7455-4F9C-962B-369EA43ED6F3}"
[HKEY_CLASSES_ROOT\.pptx\PowerPoint.Show.12]
[HKEY_CLASSES_ROOT\.pptx\PowerPoint.Show.12\ShellNew]
"NullFile"=""
https://www.zhihu.com/question/421110841/answer/2331005394