I'm having issues with my OS since updating the OS. Is there any way to reinstall the current OS (the newest/latest for my 1520) and not just doing a restore? I'm thinking the downloaded update was compromised in some fashion that is causing my issues. I'm coming from iOS and I know there is a way to do a reinstall on the iPhone, but unsure on the WP platform.
Nokia software updater (NSU) 4.1 - it should offer you a latest version ...
There is also new "Nokia Software Recovery Tool Installer 1.1.3.0" - it should be around the same, but targeting also to recovery of unresponsive cp ....
Well, there is also Nokia Care Suite (NCS - NokiaCareSuiteForStore-2013.49.3.30), some give you a chance to download and install other country fw version too (as your current one) - to use it (as it is not meant for end users), you have to use modified "UserGroupsConfiguration.cfg" file ...