i have a grave prob friends,,my comp configuration is pentium D2.8,intel d101ggc2 mobo wid 1.5gb ram,,now i had i 512mb ddr2 533 and one transcend ddr2 1b 667 stick,,,,machine was running fine till i decied to install win 7,,,i bought a new transcend ddr2 1gb 667 stick and plonked in,,now...