error on .net framework please help

hello i need your help i just built another computer and got everything back installed but i get an error when i try to run any injector it says "unable to find a version of the run time to run this application" any ideas ive tryed everything im running xp on this one havnt found a good win 7 torrent ;-)

thats what i have installed is 4.0 i got it from the driver update thread posted and stickied i updated windows,adobe,direct x flash,acrobat. im not sure what else to try? but any help is appreciated

download the latest upgrades to your graphic card, they could have been in the store for a long time and if so, some wont belatest update

also (pretty obvious): latest directx

its working noe after i installed net.framework 2.0 then i had to up date directx again but it worked thank you everyone for all your help req close