Nunzio's last reply wasn't here when I first started typing this [/edit]
There is no adware in Winamp. If there was, then I wouldn't be using it myself.
If you click
the provided links in Nunzio's post and download the plain Full
version (not any of the bundles), then there will be no emusic crap, and you can also choose
which features/plugins to install during setup, just like you could with 2.x Full.
Winamp 5.x is the direct continuation of 2.x.
There's been hundreds of bugs and critical security issues fixed between 2.76 to 2.91 and 5.0 to 5.08d. And it is due to this that we cannot support old versions!
The Official Winamp 2x Bug List
Fixed 5.x Bugs
You need to install the Full version of Winamp (whether 2.76 or 5.08d) for WMA support. Simply placing a WMA Input plugin in the Plugins folder won't work in some cases. With "WMA Support" checkmarked in the installation options, the Winamp Full installer also installs wmaudioredist.exe
(which is the Microsoft WMA v6/v7 codecs). WMA playback won't work without that package. For WMA v8 and higher, then if WiMP v8 or higher isn't installed you need to also download the newer WMA v8
"Nullsoft_wma_input_plug-in v1" is ancient and is also no longer supported. The current version of in_wm.dll with Winamp 5.08d is v2.03. Older versions of the WMA plugin did not support WMA v8/v9, because they didn't even exist back then, and the older versions also don't support DRM.
And that is all :/