Vista - CSS Blue Screen error + memo problems?

Hi. After i came back from holidays i was trying to run css on my pc. There were some updates required to install. After that i loaded the game and there was the information that the files might be loaded faster or whatever and they asked me to format something... During the format my comp restarted and the blue screen showed up for a couple of seconds. Since that moment sometimes when im trying to play css or just to use comp it happens over. The blue screen appears and the comp is being restarted. I looked up on google and ppl have got similar problem but there is no solution on that problem. I was trying to use many kinds of soft to detect the problem. I runned Memtest 86+ and it showed up around 150 000 errors on my memo... i also used memo diagnostic tool and the errors appeared as well. Additionally when there is a file greater than 2 gig~~ compressed with winrar (winrar files 46 mb each) i can not take it out from compression because there are errors showing up. I know that it is not the defective file because it works on different machine but on mine there are errors. Im thinking that it might be something with my ram im not sure... there is my pc:
intel pentium quad core 2.4/ geforce 9800 GTX/ 4 Gig of ram crucial ballistix tracer dual channel/ and asus mobo

there is the link to the blue screen info and to memtest :

http://img120.imageshack.us/img120/2352/memtestpo8.jpg

http://img168.imageshack.us/img168/3509/bs2gi9.jpg

http://img253.imageshack.us/img253/4660/bsnh3.jpg

i hope You gonna help me Thanks

That would be my first guess. Try running one stick at a time and test your ram out.

You were absolutelly right i had my comp on the warranty and i sent it back to the store where i bought from my comp. they said that one stick of ram is busted... i hope it will fix everything when i ll get my comp back again. Thx for reply