why does computer crash most days, page-30

i just tried this

http://www.memtest.org/

after burning it showed

User Name : Windows User
Company Name : CyberLink
CDKey :
OS Version : Vista Home Basic/Premium Service Pack 2
c:\Program Files\CyberLink\Power2Go\Power2Go.exe : Version 6.0.0.2325
CBS.dll : Version 7.7.3510

==================================================================

Total physical memory : 2047MB (2097151KB)
Free physical memory : 2047MB (2097151KB)
Memory load : 40 percent

Number of CPU : 4
CPU Name : AMD Phenom(tm) 9750 Quad-Core Processor
CPU Speed : 2400 MHz

If i have 4.00GB of RAM, do above results mean one stick is not working?