Well This Is Error Not As ur Ram Is been Corrupted,There Is some place Hold Be some softwares that cant be read by the memory,
You know that whatever we Install In our computer,it holds some memory In Ram,Like When U just Install A new XP,Memory Manager Shows 20% usage,after installing softwares like winamp photoshop etc ,when u press cntl+alt+del,Memory shows 78% usage,just like that,May be You have Installed Hard softwares that occupy memory A lot,Like visual plus,etc
Well It can be Removed by erasing some binary conflicts ,YOu can check your error From
*forum.iamnotageek.com/history/forum.php/141-413.html
But If you're new bie,I would suggest to Install a new copy Of windows ,with Ntfs Compressed Partition,and with slow format,just format the partition where your windows in installedi.e c:\,before Installing windows
Save your data which is there in c:\ or whatever to another partition,
Best Of luck!!!