Hello i had to swap computers because my graphics card on my other took a crap and on that computer i was able to download wemod with no issue but now that i have switched computers and have updated everything and made sure that it was allowed thru my firewall i still cant get it to download to my new computer i have tried everything any help would be nice it sys cannot install then when i do the manual install its tells me cant install look at the code and contace the aurthor
Welcome to the community. 
Installation failures are most commonly caused by interference from security programs on your PC or network.
There are other causes too, such as missing or corrupted .NET Framework files.
See here for the full troubleshooting: I can’t Install WeMod / "There was a error installing the application" - #2 by Ravenfyre.