Nvidia gt 240 problem

Hello guys, I've just registred to this forum. I hope there is somebody who can help me.
So, the problem is with my Nvidia graphic card gt240 as you can see in the thread title..
I must say that I have sent 5 emails to nvidia support, ofc no answer. I have tried to post 2 threads at their forums but every time thread DISAPPEARED?!?!?! Also I've tried to send PM to forum staff and guess what... No answer, nothing.. Im just so pissed that company like Nvidia doenst give a crap.. I must mention that I've tried to look for solutions on web but the only advice was to take sledgehammer and to smash card into milion pieces :)
System: Windows 7 Ultimate 64b
I will try to give you guys most informations I can.. Here are couple of screenshots so you can see whats going on (screenshots taken with Lightshot so feel free to click on the links):

1. http://prntscr.com/5rxtmz
2. http://prntscr.com/5rxu2j

At second screenshot you can see that image on desktop is fine. For some reson, image becomes ok as soon as I turn off Desktop Windows Manager in Task Manager menu. Why? I have no clue..
I've tried 4-5 different drivers, same crap.. Tried reinstalling system - same crap..

Please help me, I would be very grateful!
U are giving u'r self the answer. That card is old and needs to be replaced.
Yes, I know that but there is a problem... I cant afford new graphic card.. My salary is just too low, otherwise I wouldnt even ask for help if I could get myself a new graphic card..