Here’s my IIS 8.5 logs (removed identifying info)
#Software: Microsoft Internet Information Services 8.5
#Version: 1.0
#Date: 2016-07-14 17:35:22
#Fields: date time s-sitename s-computername s-ip cs-method cs-uri-stem cs-uri-query s-port cs-username c-ip cs-version cs(User-Agent) cs(Cookie) cs(Referer) cs-host sc-status sc-substatus sc-win32-status sc-bytes cs-bytes time-taken
2016-07-14 17:35:22 W3SVC655 A2NWVPWEB112 GET /wordpress/wp-admin/themes.php page=tgmpa-install-plugins&plugin_status=install 80 – HTTP/1.1 Mozilla/5.0+(Windows+NT+10.0;+Win64;+x64)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/51.0.2704.103+Safari/537.36 wordpress_aeef90fcaddcc13c77e1843011f5e58c=%7C1469652660%7C29tl9JKMt3q3ehWKdlZVwz2S0jdavRBVcMxZoKkSKPR%7Ca27040d6f8a62e4af1a621aa7f44758e424b466cd2b3bb7a20a92549fc9203fb;+wordpress_logged_in_aeef90fcaddcc13c77e1843011f5e58c=%7C1469652660%7C29tl9JKMt3q3ehWKdlZVwz2S0jdavRBVcMxZoKkSKPR%7Cbb970b4d732b4b37c78b357eae65d59c75f01c8c977a225bdda134cafc6e44e4;+wp-settings-2=libraryContent%3Dbrowse;+wp-settings-time-2=1468451508 http://xxx.com/wordpress/wp-admin/update.php?action=install-plugin&plugin=jetpack&_wpnonce=fda91949ff xxx.com 200 0 0 24834 1035 10047
2016-07-14 17:35:23 W3SVC655 A2NWVPWEB112 GET /wordpress/wp-admin/load-scripts.php c=0&load%5B%5D=hoverIntent,common,admin-bar,svg-painter,heartbeat,wp-auth-check,underscore,shortcode,backbone,wp-util,wp-backbone,media-models,&load%5B%5D=wp-plupload,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,mediaelement,wp-mediaelement,media-views,media-ed&load%5B%5D=itor,media-audiovideo,mce-view,imgareaselect,image-edit,jquery-ui-draggable,jquery-ui-slider,jquery-touch-punch,iris,wp-color-pi&load%5B%5D=cker,thickbox,jquery-ui-position,wp-pointer&ver=4.5.3 80 – HTTP/1.1 Mozilla/5.0+(Windows+NT+10.0;+Win64;+x64)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/51.0.2704.103+Safari/537.36 wordpress_aeef90fcaddcc13c77e1843011f5e58c=%7C1469652660%7C29tl9JKMt3q3ehWKdlZVwz2S0jdavRBVcMxZoKkSKPR%7Ca27040d6f8a62e4af1a621aa7f44758e424b466cd2b3bb7a20a92549fc9203fb;+wordpress_logged_in_aeef90fcaddcc13c77e1843011f5e58c=%7C1469652660%7C29tl9JKMt3q3ehWKdlZVwz2S0jdavRBVcMxZoKkSKPR%7Cbb970b4d732b4b37c78b357eae65d59c75f01c8c977a225bdda134cafc6e44e4;+wp-settings-2=libraryContent%3Dbrowse;+wp-settings-time-2=1468451508 http://xxx.com/wordpress/wp-admin/themes.php?page=tgmpa-install-plugins&plugin_status=install xxx.com 200 0 0 165047 1372 1125
2016-07-14 17:36:24 W3SVC655 A2NWVPWEB112 GET /wordpress/wp-admin/themes.php page=tgmpa-install-plugins&plugin=jetpack&tgmpa-install=install-plugin&tgmpa-nonce=2d0aef27e7 80 – HTTP/1.1 Mozilla/5.0+(Windows+NT+10.0;+Win64;+x64)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/51.0.2704.103+Safari/537.36 wordpress_aeef90fcaddcc13c77e1843011f5e58c=%7C1469652660%7C29tl9JKMt3q3ehWKdlZVwz2S0jdavRBVcMxZoKkSKPR%7Ca27040d6f8a62e4af1a621aa7f44758e424b466cd2b3bb7a20a92549fc9203fb;+wordpress_logged_in_aeef90fcaddcc13c77e1843011f5e58c=%7C1469652660%7C29tl9JKMt3q3ehWKdlZVwz2S0jdavRBVcMxZoKkSKPR%7Cbb970b4d732b4b37c78b357eae65d59c75f01c8c977a225bdda134cafc6e44e4;+wp-settings-2=libraryContent%3Dbrowse;+wp-settings-time-2=1468451508 http://xxx.com/wordpress/wp-admin/themes.php?page=tgmpa-install-plugins&plugin_status=install xxx.com 200 0 0 8792 1072 60643
2016-07-14 17:36:32 W3SVC655 A2NWVPWEB112 POST /wordpress/wp-admin/admin-ajax.php – 80 – HTTP/1.1 Mozilla/5.0+(Windows+NT+10.0;+Win64;+x64)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/51.0.2704.103+Safari/537.36 wordpress_aeef90fcaddcc13c77e1843011f5e58c=%7C1469652660%7C29tl9JKMt3q3ehWKdlZVwz2S0jdavRBVcMxZoKkSKPR%7Ca27040d6f8a62e4af1a621aa7f44758e424b466cd2b3bb7a20a92549fc9203fb;+wordpress_logged_in_aeef90fcaddcc13c77e1843011f5e58c=%7C1469652660%7C29tl9JKMt3q3ehWKdlZVwz2S0jdavRBVcMxZoKkSKPR%7Cbb970b4d732b4b37c78b357eae65d59c75f01c8c977a225bdda134cafc6e44e4;+wp-settings-2=libraryContent%3Dbrowse;+wp-settings-time-2=1468451508 http://xxx.com/wordpress/wp-admin/themes.php?page=tgmpa-install-plugins&plugin_status=install xxx.com 200 0 0 544 1185 8859
Could you try to install the plugin manually as explained here:
http://codex.wordpress.org/Managing_Plugins#Manual_Plugin_Installation
If you’re not sure how to do this, you can ask your hosting company for help. They should also have documentation explaining how to upload files to your site using FTP or a File Manager in your admin panel.
Let me know how it goes.
Well hot damn, that was easy enough. Never knew you could go that route. Thanks!