Ok so i had a derp moment and accidently installed IW5M in my IW4M folder.

 

I had placed the IW5M files in the IW4M folder and installed i hardly even noticed because i was in a rush. After comming back i had decided to play 4D1 and recieved this error:

 

Fatal error (0xc0000005) at 0x0051e676.

A minidump has been written to iw4m-3.0-105-20120823192926.dmp

 

I needs help. any help would be appreciated.

Download the IW4M installer again.

Installing IW4M again won't be enough.

IW5M updater replaces some files at \main and \zone\english folders.

You could get iw_23.iwd from the IWD repository, but you'll have to reinstall MW2 again in order to restore your overwritten fastfiles (unless you can get them from a friend, since those files are not that big)

 

main:
iw_23.iwd

zone\english:
code_post_gfx.ff
code_post_gfx_mp.ff
code_pre_gfx.ff
code_pre_gfx_mp.ff
localized_code_post_gfx_mp.ff
localized_code_pre_gfx_mp.ff
localized_ui_mp.ff
patch.ff
patch_mp.ff
ui.ff
ui_mp.ff

Those are the files that you'll have to grab from another MW2 installation.