[tonyjune]

I am a long time user of Calibre, and love it, but am a real dinosaur when it comes to the use of computers. I saw that caliber had found an update 2.63.0 So downloaded same. Installed it. The books are there, but whenever I try to use any of the headers, I get an import error.
For example, if I press "add books" I receive the message " Zip import error, can't find module win32.com. When I open show details, I get
Traceback (most recent call last):
File "site-packages\calibre\gui2\actions\add.py", line 424, in add_books
File "site-packages\calibre\gui2\__init__.py", line 713, in choose_files
File "site-packages\calibre\gui2\__init__.py", line 624, in __init__
File "site-packages\calibre\utils\filenames.py", line 520, in expanduser
File "site.py", line 66, in load_module
ZipImportError: can't find module win32com

When I press "edit data" I receive the message " zip import error, cant find module caliber.gui2.metadata.single and details are
Traceback (most recent call last):
File "site-packages\calibre\gui2\actions\edit_metadata.py", line 299, in edit_metadata
File "site-packages\calibre\gui2\actions\edit_metadata.py", line 322, in edit_metadata_for
File "site-packages\calibre\gui2\actions\edit_metadata.py", line 346, in do_edit_metadata
File "site.py", line 66, in load_module
ZipImportError: can't find module calibre.gui2.metadata.single

This is common to all the headers but different details.

Can anyone please tell me what I have done wrong? More importantly, how do I fix it.
Thankyou in anticipation.

Tony