This can be corrected very simply as follows.
Using the wampmanager menus do the following :-
left click wampmanager -> Apache -> Version
and then click the version number, probably 2.4.9
This will cause WAMPServer to rebuild of all the SYMLINK's in the apache2.4.9/bin folder and that will put the correct symlinks in there for these 2 extensions.
TO CORRECT THE SECOND ISSUE
Edit the wampscriptconfig.inc.php
file and find the code that sets this variable $phpDllToCopy
and replace it with this code.
$phpDllToCopy = array (
'icudt52.dll', //[modif oto] - Ajouts pour éviter unknown error PHP 5.6.a2
'icuin52.dll',
'icuio52.dll',
'icule52.dll',
'iculx52.dll',
'icutest52.dll',
'icutu52.dll',
'icuuc52.dll',
'icudt51.dll', //[modif oto] - Ajouts pour éviter unknown error PHP 5.5.6
'icuin51.dll',
'icuio51.dll',
'icule51.dll',
'iculx51.dll',
'icutest51.dll',
'icutu51.dll',
'icuuc51.dll',
'icudt50.dll', //[modif oto] - Ajouts pour éviter unknown error PHP 5.5
'icuin50.dll',
'icuio50.dll',
'icule50.dll',
'iculx50.dll',
'icutest50.dll',
'icutu50.dll',
'icuuc50.dll',
'icudt49.dll', //[modif oto] - Ajouts pour éviter unknown error PHP 5.3/5.4
'icuin49.dll',
'icuio49.dll',
'icule49.dll',
'iculx49.dll',
'icutest49.dll',
'icutu49.dll',
'icuuc49.dll',
'libeay32.dll',
'libsasl.dll', //[modif oto] - Ajout pour éviter unknown error
'libintl.dll',
'php5isapi.dll',
'php5nsapi.dll',
'ssleay32.dll',
'php5ts.dll',
'fribidi.dll', //[modif oto] - Ci-contre et dessous pour PHP 5.2.x
'fdftk.dll', // Peuvent être supprimés pour PHP 5.3.0 ou plus
'libmcrypt.dll',
'libmhash.dll',
'libmysql.dll',
'libmysqli.dll',
'msql.dll',
'ntwdblib.dll',
'php5activescript.dll',
);