NSIS Intaller - Expert Needed(repost)

I have an nsis installer file for our screensavers that needs to be updated. It needs to install and uninstall without errors on Windows XP, Vista, Windows 7, 32 and 64 bit versions of all. The nsi file seems to install the applications just fine, but it often uninstalls with errors, such as an "[login to view URL] has stopped working" error, or some end users have experienced "Installer corrupted:invalid opcode" So this is a testing and fixing job for an nsis expert. You must test final installer on multiple versions of windows, several times to make sure no errors are occurring. We will provide the necessary files, such as graphics, current state of the .nsi file, .scr screensaver file, for you to fix and update the installer and do your testing. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Worker in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the worker's Worker Legal Agreement). ## Platform Windows XP, Vista, Windows 7, all versions, 32 bit and 64 bit.