Fix: can not delete install subfolder after upgrading phpBB on IIS

Fix: can not delete install subfolder after upgrading phpBB on IIShttps://www.dotnetzone.gr:443/cs/blogs/birbilis/archive/2012/10/18/fix-can-not-delete-install-subfolder-after-upgrading-phpbb-on-iis.aspxTo upgrade a phpBB forum, one usually downloads an automatic upgrade package to the latest version, selecting on the website which version they currently have. The current version number at a phpBB installation is shown at the Admin Control Panel (there’selCommunityServer 2.1 SP3 (Build: 20423.1)